我想对你的指导表示衷心的感谢。

I'd like to say a heartfelt ___thank ___you for your guidance.

这些花是对我们款待的可爱感谢。

The flowers were a lovely ___thank ___you for hosting us.

他写了一封个人感谢信，感谢所获得的帮助。

He wrote a personal ___thank ___you for the help he received.