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1、The number of overweight or obese children in China's big cities is wildly increasing at a rate of about one in five on average.

Experts   21   the problem to bad eating habits plus a lack of proper health knowledge and say obese children are taking more calorie-rich junk food while   22   less. Some cases of genetic obesity are also attributed to super-nutrition of mothers during pregnancy （懷孕）.

Obesity brings about many health   23   such as high blood pressure, fatty liver, heart attack, and other   24   that increasingly affect people's lives.

Being overweight is not only a health problem, but also an obstacle for children in   25  , health experts added. Obese or overweight children may often be prejudiced （有成見的） against or   26   at by others, which may make the problem even   27  .

Although medicine is one choice, experts view a healthier   28   is the best way to solve overweight problems. They suggest that schools provide more   29   and facilities for students to exercise so they can    30   healthy habits from the beginning.