写作：你的朋友Ann经常生病，给她写封信，告诉她应该如何保持身体健康。

　　建议：1 多参加体育锻炼

　　2 多到户外活动，呼吸新鲜空气

　　3 多吃蔬菜，水果

　　4多喝水和牛奶

　　5 保持充足的睡眠

　　6 保持乐观的心情

　　[范文]

　　关于怎样保持身体健康(about how to keep healthy)

　　Dear Ann

　　I heard that you often get ill. I have just found some information on the internet about how to keep healthy. Hope this is helpful for you.

　　Firstly, you sould do more sports exercises. You should play basketball or volleyball more often with your friends.

　　Secondly, you should take part in more outdoor activities and breathe in fresh air more frequently.

　　Thirdly, you should eat more fruits and vegetables, drink more water and milk, and get enough sleep(at least10 hours a day).

　　Lastly and most importantly, you need to always keep an optimistic point of view towards life.

　　I'm if you can do all this well, you will be much more healthier and happier!

　　Yours faithfully