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While teenagers who are at risk of depression with risky behaviors — drinking alcohol, smoking cigarettes and cutting classes often alert parents and teachers that serious problems are brewing, a new study finds that there's another group of adolescents who are in nearly as much danger of experiencing the same mental symptoms.

These teens use tons of media, get insufficient sleep and have a sedentary (不爱活动的) lifestyle. Of course, that may sound like a description of every teenager on the planet. But the study wars that it is teenagers who engage in all three of these practices in the extreme that are truly in a dangerous position. Because their behaviors are not usually seen as a red flag, these young people have been called the "invisible risk" group by the study's authors.

The study's authors surveyed 15, 395 students and analyzed nine risk behaviors, including excessive alcohol use, illegal drug use, heavy smoking and high media use. Their aim was to determine the relationship between these risk behaviors and mental health issues in teenagers. The group that scored high on all nine of the risk behaviors was most likely to show symptoms of depression; in all, nearly 15% of this group reported being depressed, compared with just 4% of the low-risk group. But the invisible group wasn't far behind the high-risk set, with more than 13% of them exhibiting depression.

The findings caught Carli off guard. "We didn't expect that, " he says. "The high-risk group and low-risk group are obvious, but this third group was not only unexpected. It was so distinct and so larger — nearly one third of our sample — that it became a key finding of the study. "

Carli says that one of the most significant things about his study is that it provides new early warning signs for parents, teachers and mental health-care providers. And early identifications, support and treatment for mental health issues, he says, are the best ways to keep them from turning into full-blown disorders. 

After COVID-19, the Bureau of Labor Statistics predicts that while the number of nurses has increased in the past three years, the U. S. still experiences a shortage of registered nurses, and that there will be over one million unfilled nursing jobs. So what's the solution? Robots.

Japan is ahead of the curve when it comes to this trend. Toyohashi University of Technology has developed Terapio, a robotic medical cart that can make hospital rounds, deliver medications and other items, and retrieve records. This type of robot will likely be one of the first to be implemented in hospital. 

Robots capable of social engagement help with loneliness as well as cognitive functioning, but the robot itself doesn't have to engage directly — it can serve as a mediator for human communication. Telepresence robots such as MantaroBot, Vgo, and Giraff can be controlled through a computer, smartphone, or tablet, allowing family members or doctors to remotely monitor patients or Skype them. If you can't get to the nursing home to visit grandma, you can use a telepresence robot to hang out with her.

A robot's appearance affects its ability to successfully interact with humans, which is why the Human-Interactive Robot Research decided to develop a robotic nurse that looks like a huge teddy bear. RIBA, also known as "Robear, " can help patients into and out of wheelchairs and beds with its strong arms.

On the less cute and more scary side there is Actroid F, which has such resilient skin and natural hair color that some patients may not know the difference. This conversational robot companion has cameras in its eyes, which allow it to track patients and use appropriate facial expressions and body language in its interactions. 

It's important to note that robotic nurses don't decide courses of treatment or make diagnoses. Instead, they perform routine and laborious tasks, freeing nurses up to attend to patients with immediate needs. This is one industry where it seems the integration of robots will lead to cooperation, not replacement.

The South Bronx is one of the poorest and most polluted places in America, with smog-choked freeways and smelly wastewater treatment plants. 

"We're a dumping ground, " Omar explains. "All the garbage from the rest of New York City ends up here. "

But Omar started looking at garbage in a different way. "A lot of what people throw away is perfectly good, " he says. "Just look at that stuff from construction sites — doors, sinks, toilets. People will buy those things. It's only called garbage because somebody threw it away. " Omar was just out of college and working for an environmental group called Sustainable South Bronx when he started considering how to get this "good garbage" to people who could use it. Instead of destroying old things, why not clean them up and resell them? Why not hire people in the community to do the work? Better yet, why not make this business a "cooperative, " which means the people working in the business own it and share the profits?

Out of this, Omar started the first cooperative in the country dedicated to reusing construction waste. To start his business, Omar put up flyers along the truck-jammed, trash-filled neighborhood streets, looking for people to work with him. He soon found four other dedicated workers. They rented a warehouse and started looking for donations of used materials. 

In April 2008, Omar's cooperative, ReBuilders Source, opened its business and began selling construction supplies — at reasonable prices — to neighborhood builders and home owners. With the help of city officials, he also began planning a new training program to help local residents learn the skills to get good jobs that help the environment and even start their own cooperatives. Workers were trained to carefully take buildings apart so that things like doors and windows can be reused instead of being smashed and sent off to a landfill. Deconstructing buildings this way could be a huge industry with many good jobs for people who need them.

"If you have a use for something, " Omar says, "it's no longer waste. "

Fascinating Activities You Can Take Part In

Boston Fenway Park: Guided Ballpark Tour with Options

★★★★★4.8/5  1570 reviews

You will uncover the history of Fenway stadium and its beloved team, the Red Sox, and discover more than 170, 000 stadium artifacts and 150, 000 photographs. You can choose from 1-hour tour, a pre-game tour, or a 15-minute tour. 

Tromsø: Snowmobile Safari in the Lyngen Alps

★★★★★4.9/5  279 reviews

You will experience the spectacular Lyngen Alps while driving a snowmobile in beautiful scenery at Camp Troll, where everything is inspired by trolls. After taking pictures, you will head back to the base camp to enjoy a hot meal served around the fire. 

Cairo: Grand Egyptian Museum (GEM) Tour

★★★★★4.6/5  1243 reviews

You will see more than 100, 000 excellent artifacts in Egypt's long-awaited GEM. Among the collection, you'll find 5, 000 treasures unearthed from the tomb of Egyptian pharaoh Tutankhamun, which will be on public display for the first time in history.

Dubai: Tandem Skydive Experience at The Palm

★★★★★4.8/5  212 reviews

Admire Dubai from a new perspective. You will feel an incredible adrenaline (肾上腺素) rush as you fly up to 13, 000ft into Dubai's sky before free falling at 120mph. You will have the entire dive documented by a professional camera flyer who will accompany you.

Eva spent the first week of high school trying to keep her head above water. One of the major headaches for her was finding her way in the huge school building. It was a six-story building. On each floor, hallways stretched in four directions, leading to classrooms, laboratories, and teachers' offices. Somewhere in the building, there was also a library, a cafeteria, and a gym.

Having a poor sense of direction, Eva found it impossible to get around in such a huge building. All the different hallways and rooms were too much to think about, let alone commit to memory. She decided that she would memorize where her classes were and then pretend that the rest of the place didn't exist.

In her first PE class, Eva was shocked when Coach Pitt announced that everyone had to run one mile around the track outside. She searched the faces of her classmates for signs of panic. There was nothing she feared more than having to run a whole mile. To Eva, "a mile" was used to describe long distances. It was ten miles from her home to her grandfather's, and that always seemed like a long way, even in a car!

When Coach Pitt blew his whistle (哨子), Eva figured she would be left in the dust. However, while some of her classmates edged ahead, others actually fell behind. " It's just the beginning, "she thought. " I'll come in last for sure. "

Soon Eva began to breathe hard, with her heart pounding and legs shaking. Feeling desperate, Eva started using a mind trick on herself. She stopped thinking about the word" mile. "Instead, she focused on reaching the shadow cast on the track by an oak tree up ahead. Then she concentrated on jogging to the spot where the track curved (拐弯). After that, she tried to see if she could complete her first lap. One lap turned into two, then three, then four.

注意：
1. 续写词数应为150左右;
2. 请按如下格式在答题卡的相应位置作答。

Paragraph 1: 

When Coach Pitt said "Nice work!" to her at the finish line, Eva was surprised.

Paragraph 2: 

Eva decided to use the same trick to deal with the school building. 

注意： 1. 写作词数应为80个左右；
2. 请按如下格式在答题卡的相应位置作答：
 

Stand Up and Exercise, Everybody!

The shelves in most supermarkets are full of family-size this and multi-buy that. However, if you're shopping for one, buying extra (benefit) from price reductions doesn't make sense. Either your shopping is then too heavy to carry home you can't use what you've bought while it's still fresh.

Of course, shops are not charities — they price goods in the way will make them the most money. If most of their customers are happy to buy larger quantities, that's they'll promote. But that leaves the solo (单独) customers out of pocket and disappointed.

Many supermarkets are no longer doing "buy one get one free" promotions because of the (criticize) that they lead to waste. Consumers prefer money off individual items. However, though it's nice to get a few cents off a pack of sausages, it would help even more if they could sometimes (offer) in smaller packs. Even the biggest sausage fan doesn't want to eat them every day.

If your supermarket sells loose produce, then buying smaller quantities is easier. Over the last two years, some supermarkets  (start) selling chicken or salad in packs  (design) with two halves containing separate portions (份). Then, when you use one section,  other stays fresh. 

Who knows, perhaps some of the more forward-looking (one) may yet come out with a whole range of "just for you" pack sizes with special offers as well.

While taking a 20-hour train ride along the edge of the Taklimakan Desert in northwestern China, I had the kind of humbling, educational, and above all else, wonderful 1  with a local that all travelers long for. A young Chinese man 2  me on the train. My 3  friend spoke virtually no English, so I happily took the 4  to practice my Chinese. 

Over several hours he would tell me about how he had 5 a two-year professional school to quickly find a job 6 highways in order to help support his family. Perhaps the most 7 , however, was the fact that this man spent hours studying every day after hard physical labor. Without batting an eye, he would 8 a translated Emerson passage before asking about the literary influence of American 9 as a whole. "And what do you all learn about Russian authors?" I 10 him asking at one point.

It would have been easy to 11  my assumptions about this highway builder who had never been more than a few hundred miles from home. But this highly informed, 12  , and admirable person prevented me doing so. In the course of a couple of hours, he 13  me just how much one can gain from 14  with an open mind, and a willingness to 15  with locals from all walks of life. 

In the past few years, online learning has become a significant part of the university and college experience.  But are all online courses created equal? How can you be sure that digital learning is right for you?  

We interviewed students and professors to get their advice about online courses, The most obvious advantage of online learning is that you can study anywhere and anytime. "I think a point that many people lose sight of is how easy it can be to fall behind schedule, " says graduate student Amanda Bindman. Before choosing to study online, consider whether you're a self-motivated learner and if the material seems interesting enough to keep you going.

The tip that comes up most often is simple: build online courses into your weekly schedule, just like what you would do with in person courses.  He noted that his online students usually end up with lower grades. It is so easy to let an online course slide, but your grades will suffer as a result. Be sure to schedule set times to watch your lectures, read materials and contribute to online discussion boards. 

  A social connection is often a big part of learning. There are things you can do to ease this problem. Jessica Pink an undergraduate student, suggests taking online courses with a friend, so you can motivate each other to stay on track. You can also find students on the class discussion board to organize a study group, or schedule in-person meeting s with your professor to discuss course concepts. 

A. But that doesn't mean there aren't deadlines.

B. Your motivation should be your main concern. 

C. Do you know that online courses are also part of your education?

D. Professor Alex Davidson teaches the same course in person and online. 

E. The chief complain t about online courses is that they lack human interaction. 

F. If you take an online course, what can you do to ensure the best possible grade?

G. A survey found that 29 percent of college students registered for online courses. 

The Stanford marshmallow (棉花糖) test was originally conducted by psychologist Walter Mischel in the late 1960s. Children aged four to six at a nursery school were placed in a room. A single sugary treat, selected by the child, was placed on a table. Each child was told if they waited for 15 minutes before eating the treat, they would be given a second treat. Then they were left alone in the room. Follow-up studies with the children later in life showed a connect ion between an ability to wait long enough to obtain a second treat and various forms of success. 

As adults we face a version of the marshmallow test every day. We' re not tempted (诱惑) by sugary treats, but by our computers, phones, and tablets — all the devices that connect us to the global delivery system for various types of information that do to us what marshmallows do to preschoolers.

We are tempted by sugary treats because our ancestors lived in a calorie-poor world, and our brains developed a response mechanism to these treats that reflected their value — a feeling of reward and satisfaction. But as we've reshaped the world around us, dramatically reducing the cost and effort involved in obtaining calories, we still have the same brains we had thousands of years ago, and this mismatch is at the heart of why so many of us struggle to resist tempting foods that we know we shouldn't eat.

A similar process is at work in our response to information. Our formative environment as a species was information-poor, so our brains developed a mechanism that prized new information. But global connectivity has greatly changed our information environment. We are now ceaselessly bombarded (轰炸) with new information. Therefore, just as we need to be more thoughtful about our caloric consumption, we also need to be more thoughtful about our information consumption, resisting the temptation of the mental "junk food" in order to manage our time most effectively.