Thanks a million. I really appreciate it.

万分感谢，真的是帮了我大忙啦。

I really appreciate what you've done for me these days.

我真的很感激这些天来你对我的帮助。

It's very kind of you to help me.

你能帮助我真是太好了。

I really don't know what I would have done without your help.

真不知道没有你的帮助我该怎么办。

Thank you for one of the most enjoyable visits we have had in many months.

在您处的参观访问，是我们几个月中最愉快的一次。谨向您表示感谢。

Thank you for contributing so much to the pleasure of our staying……

感谢您使我们在……停留期间的愉快所作的许多努力。

Thank you so much for your generous hospitality.

非常感谢您慷慨的款待。

You must give me the chance to return your kindness when you visit here.

希望您光临我处，使我能答谢您的盛情。

Thank you very much (ever so much) (most sincerely) (indeed)(from the bottom of my heart)。

很(非常)(最真诚地)(确实)(衷心)感谢您。

It's generous of you to take so much interest in my work( togive me so much of your time) (to show me so much consideration)。

承蒙您对我的工作如此操心(为我花费这么多时间)(对我如此关怀)。

At the outset， I want to thank you for your kindness to me and for your compliments.

首先，我要感谢您对我的友爱和问候。