Directions: Write an English composition in 120—150 words according to the instructions given below in Chinese.
你是新华中学的高三学生张敏。临近毕业，同学间正在互留赠言。假设李华是你的同班好友，请给他/她写一封邮件，你需要在邮件中：
1)写明你给他/她的临别赠言；
2)结合李华的高中生活经历，谈谈你送他/她该赠言的理由。
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