题目内容：

去年以来，诸如抖音( Tik Tok)等拍摄和发布短视频的手机应用程序在年轻人中颇受欢迎。假如你是李华，英国笔友May来信向你了解中国学生玩抖音的情况，并请你谈谈它的利与弊。

注意:1.词数100左右；2.开头和结尾已给出，不计入总词数

Dear Mary,

So glad to he hear from you!

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Best wishes!

Yours sincerely

LiHua