急阿！！求英语作文《节食利弊》

Dear Lily:
I haven't heard from you for a long time.But I recently got the news that you are on dieting for your wedding.I was really surprised when I heard this.You do not look fat.So far as I knew, dieting does harm to our body for that we are working class and we need enough energy to run for our daily life. Once you ask for slim body by dieting, the damage done to your liver is irreversible which will require your pay back by subhealthy body status that can make your husband worrying about you.
Sport is a good and healthy way to keep slim body. Long-distance run can burn your fat faster which can also develope your persistence.
Well,as an old friend , that is for all my advice.I hope to see a healthy Lily when come back to hometown during this spring festival vacation.
I sincerely hope both of you are happy.

Yours
Martin