Have a healthy lifestyle

As we all know, health is very important. Only when we are healthy can we study well and enjoy life.

However, many teenagers don't pay any attention to their health, especially during the holiday. And they spend too much time watching TV, playing games and chatting on the Internet all night, which is bad for their health. First, this may make them get near-sighted. Besides, their bodies become much weaker. Thirdly, they will lose the chance to communicate with others face to face as they never go out, which may have a bad effect on their mental health.

In my opinion, they should spend less time in front of the TV or the computer, go out to take some exercises, play some sports and visit some friends and have a healthy lifestyle.

题目分析：题目是一个材料作文，作文的框架和写作要点已经给出，写作难度不大。可以分三部分来写，第一部分总述现象；第二部分详细描述现象；第三部分给出自己的看法和建议。使用第一人称进行写作；注意标点符号、拼写、时态和语法知识的正确运用；一定要用上参考词汇。

【亮点说明】范文使用了一些重要的语法知识：倒装句Only when we are healthy can we study well and enjoy life.；非限制性定语从句which is bad for their health和which may have a bad effect on their mental health；非谓语动词playing games and chatting on the Internet all night；语法知识运用灵活、得体；

范文还使用了较多的短语和固定搭配：pay any attention to, spend too much time watching TV, make them get near-sighted, become much weaker, the chance to communicate with, face to face, as they never go out, in front of等，使作文显得内容充实；

范文注意使用As we all know, However, In my opinion, especially等衔接上下文；使用First, Besides, Thirdly进行列举，使作文语意连贯，富有条理性和层次性；