参考答案：
All of us want to be healthy. First，we should get enough sleep during the night. We can go to bed early and get up early. Staying up late is bad for our health. Second, we must have the right kinds of food. We should eat more fruit and vegetables and less meat. We should drink a lot of water. We should have healthy eating habits. Third, we should do more exercise to build up our bodies. Finally, we should wash hands before meals and brush our teeth twice a day. If we don't feel well, we should go to see the doctor at once.
