【正确答案】[范文]
   In some countries, citizens are becoming heavier and their levels of health are dropping correspondently. I think there are two main causes for this situation, but the possible solutions are many.
   The most common causes of increased weight are unhealthy lifestyle and the high-paced life. People, especially youngsters, are apt to indulge in all kinds of online games. They spend most of their time sitting in front of computers without any move. This unhealthy lifestyle increases the risk of being obese. Moreover, living in a fast-tempo age, people want to deal with everything in the fastest way, such as eating. So fast food becomes a popular choice for students and white-collars. However, it's known that fast food contains lots of calories and fat, which makes people fatter and fatter.
   Even though the issue is serious nowadays, we still have some solutions to this problem. Companies and schools should advocate a healthy concept by holding regular exercises. For those office workers, they should do some exercises such as stretching out and walking around regularly. In addition, it's also essential to have a healthy diet. You should resist the temptation of high-calorie food and keep the goal of having a healthy body in mind all the time.
   All in all, everyone should take actions to keep fit. If you can insist carrying out the above measures, I believe the average level of health will be increased significantly.