请根据下列所给的信息提示， 以 “ How to keep healthy” 为题写一篇70个词左右的短文。
提示：1. No sports, no life. 生命在于运动。 
           2. An apple a day keeps the doctor away. 一天一个苹果，医生远离我。
           3. famous proverb 名言
     _____________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________