题目内容：

假如你是李华。你的朋友Tommy是一个手机低头族，无论站着、坐着、走着，他都在低头玩手机。请就此给Tommy写一封信，说服他改掉这个坏习惯。

注意：1．词数100左右；

2．可适当增加细节，以使行文连贯；

3．开头语和结尾语已给出，不计入总词数。

参考词汇：过度使用overuse

Dear Tommy,

There are many people now playing with their cell phones no matter where they are. And I know you are not an exception.

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Yours,

Li Hua