尾段：
表示感谢
My thanks for you to your generous help are beyond words.
我对您的慷慨帮助的感谢难以言表。
Words fail me when I want to express my sincere gratitude to you.
感激之情，溢于言表。
I take this opportunity to show my heartfelt appreciation to the kind assistance you rend me.
我想借此机会对您的热心帮助表示衷心的感谢。
期待回信
I am looking forward to your favorable reply at your earliest convenience.
期待您在方便之时尽快给予我圆满的答复。
Your prompt attention to my inquiry would be highly appreciated.
十分感谢您对我的询问给予及时的关注。