根据以下提示，请以"How to Keep Healthy"为题写一篇短文．从良好的生活习惯、适当的体育锻炼以及健康的饮食习惯等方面，为"how to keep healthy"提出良好的建议．

要求：1．表达清楚，语句通顺，意思连贯；

2．不得使用真实的地名、校名和姓名等；

3．词数：80左右．文章的开头与结尾部分已给出，不计入总词数．

部分参考词汇：熬夜stay up；垃圾食品junk food；均衡饮食keep a balanced diet；按时饮食have meals regularly

How to Keep Healthy

     Nowadays，more and more people know the importance of keeping healthy…

　　                                                                   

                                                                              

In this way，we can enjoy a happy life．