假如你叫李华，从某网站看到下面调查统计表，感触很深，从而决定写信给某英语报社，反映这一现实，并简要分析原因，呼吁教育部门和家长改变目前局面。
注意：
1．语言要连贯、准确，可适当发挥；
2．词数120—150。
Dear editor,
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Yours sincerely,
Li Hua
Dear editor：
It can be seen easily from the above chart that American students 72 minutes on physical activity per day, and those in South Korea 42 minutes．However, Chinese students have only 12 minutes for physical activity per day．
The reasons be in the following．Almost all the time is spent on lessons in Chinese schools and students are made by parents to concentrate on their study even when they get back bones．Thus there is little time left for their physical activities．
In my opinion, both the Education Departments and parents are responsible to give the students more times for physical activity．Anyhow, knowledge can be learned not only from books but also through activities．
Yours sincerely,
Li Hua