示例：

Dear______,

I am writing to extend my sincere gratitude for ________(感谢的原因). If it had not been for your assistance in _________(对方给你的具体帮助), I fear that I would have been_________(没有对方帮助时的`后果).

Every one agrees that it was you who__________(给出细节).

Again, I would like to express my warm thanks to you! Please accept my gratitude.

Yours sincerely

Li Ming