题目内容：

假定你是李华。你的好友李涛说高三学习压力太大，他有点担心自己坚持不住。请你用英语给他写一篇短信，内容包括：

1.坚持(perseverance)的重要性；

2.举例说明；

3.你的想法。

注意：

1.词数100左右；

2.可以适当增加细节.，以使行文连贯；

3.开头和结尾已为你写好。

Dear Li Tao,

How are you? It's unnecessary for you to worry about anything. _______________

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Your,

Li Hua