假定英語課上老師要求同桌之間交換修改作文，請你修改你同桌寫的以下作文。文中共有10處語言錯誤，每句中最多有兩處，每處錯誤僅涉及一個單詞的增加、刪除或修改。
增加：把缺詞處加一個漏字符號（∧），并在其下面寫出該加的詞。
刪除：把多余的詞用斜線（\）劃掉。
修改：在錯的詞下劃一橫線，并在該詞下面寫出修改后的詞。
注意：1.每處錯誤及其修改均僅限一詞；
2.只允許修改10處，多者（從第11處起）不計分。
Dear Li，
    I have read your letter，in which you mention that you wanted to lose weight by dieting.
    It's naturally for young girls of your ages to wish to look beautiful.Therefore，in my opinion，health is more important than beauty.For a student，studying is the first thing to consider while appearance is the second.So don't let others' opinions to affect your normal life.However，if you do want to lose weight，it's good idea to do it by getting more exercise and change unhealthy eating habits.The most important thing is that you keep a healthy state of mind，as they will help with your studies，and will also help you overcome difficulty in dieting.
    I hope my advice will be helpful with you.
Yours，
Tom