2 . 假如你是Q市某中学高一年级学生李华，请以自己的亲身经历，根据以下提示写一篇文章参加中国日报“Sports and Fitness.”的征文比赛,内容如下：
1. 自己过去的情况：饮食、运动、生活方式；
2. 决心改变自己：原因，方式；
3. 改变带来的结果。     
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