题目内容：

假定英语课上老师要求同桌之间交换修改句子，请你修改你同桌写的以下句子。每句中有一处错误，每处错误仅涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏字符号∧，并在其下面写出该加的词。  删除：把多余的词用斜线＼划掉。修改：在错的词下划一横线，并在该词下面写出修改的词。

注意：每处错误及其修改均仅限一词

I have received and read your letter, in which you said you want to lose weight by dieting. It is natural that young girls at your age hopes to look beautiful. And in my opinion, health is more important than beauty. Do not let others’ ideas to affect your normal life. However, if you do want to lose weight, it is good idea to do it by taking more exercise. The most important thing is that you keep up a health state of mind. And it will help you on your studies and help us get over difficulties on dieting. I hope my advices will be helpful to you and I’m looking forward to hear from you soon.