健康对每个人都非常重要，但许多中学生对此缺乏认识，为了让你的同学更多的了解这方面的知识，请根据图示，以“How can we keep healthy?”为题写一篇短文。
要求：
1．表达清楚，语法正确，上下文连贯；
2．必须包括所有相关信息，展开想象，适当发挥；
3．词数：80词左右, 开头已给出,不计入总词数；
4．不得使用真实姓名和校名等。
How can we keep healthy?
Good health is very important for everyone, but most of us don’t know how to keep fit.
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