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With more and more foreigners , more than five hundred Confucius Institutes all around the world.

I the friend always , and his help means a great deal to me.

On my way back that afternoon, in the3 place I saw an ambulance and the man was being4 by two nurses. He wasn't a derelict but a worker, who5 fell ill on his way to work.

Shame shocked me when I realized that sick, old man had put up with the6 of the entire day. He probably reached out to passers-by for7. No one stopped. No one8.

A different season and I again9 an old man half lying on the footpath. Caught up in the10 rush of people commuting (乘车上下班), I would have11 him quickly as I had done before. However, the12 of the old Winter Man forced me to walk to the man on the ground, who was dressed in smart clothes but lifeless, and13 down to ask if he was OK. He14 consciousness again, and told me he was diabetic (糖尿病) and15 me to call an ambulance for him, which I did.

Very weak, he said to me, in a16, "Nobody stopped. Thank you." I looked into his eyes for a moment in17, but much was spoken without a word being said.

As the18 ambulance siren (警笛声) announced the arrival of help, a number of19 rushed at me: sadness for the Winter Man and20 that I didn't walk past another person in need. I was amazed that it had been so easy to be helpful.

The increase from the current 32 percent to 50 percent of kids taking part in exercise, active play, or sports would also result in 340,000 fewer overweight teenagers.

"Physical activity not only makes kids feel better and helps them develop healthy habits, it's also good for the nation's bottom line," says Bruce Y. Lee, executive director of the Global Obesity Prevention Center at Johns Hopkins University. "Our findings show that encouraging exercise and investing in physical activity when kids are young pays big dividends as they grow up."

The study, published in the journal Health Affairs, suggests an even bigger advantage if every 8 to 11-year-old in the United States exercised 75 minutes over three times in a week. In that case, the researchers estimate (估计), ＄62.3 billion in medical costs over the course of their lifetimes could be avoided and 1.2 million fewer youths would be overweight. And the money would increase if not just current 8-to-11 year olds, but every future elementary school child joined their game.

Exercise at least 25 minutes a day, three days a week, is a guideline developed for kids by the Sports and Fitness Industry Association. An overweight person's lifetime medical costs average ＄62,331. For the overweight person, these amounts are great.

"Even a little increase in physical activity could cause billions of dollars in savings," Lee says. He also says there are other benefits of physical activity that don't affect weight, such as improving bone density, improving mood, and building muscle.

Lee says "We need to be adding physical education programs and not cutting them. We need to encourage kids to be active, to reduce screen time and get them running around again. It's important for their physical health and the nation's financial (经济的) health."