假如你叫李华，你的朋友Jenny信向你询问如何保持健康。请你给他发一封E-mail提些建议。内容要点如下：
1. 注意合理饮食,多吃水果蔬菜；
2. 保证充足睡眠，至少8小时；
3. 坚持锻炼身体，多参加体育运动。
注意：
1.词数100左右；
2.可适当增添细节，以使行文连贯；
3.邮件的开头结尾已为你写好，不计入总词数。
Dear Jenny,
How nice to hear from you! In your letter you asked me how to keep healthy. I would like to give you some advice.
_
Yours
Li Hua
How nice to hear from you! In your letter you asked me how to keep healthy. I would like to give you some advice.
We know, food is of great important to us teenagers. Since we grow very fast , we are in need of nutritious food , such as fresh vegetables, fruits, fish, meat and so on. However, I think you’d better not eat food with much sugar and fat. And you should get plenty of sleep, which is necessary for you to have at least eight hours of sleep every day. In addition, you should take physical exercise regularly. It will be beneficial to your health. Only in this way can you keep fit.
Best wishes!