英语商务信函中，开头的客套话应该怎么写？比如：很抱歉打扰到您了。

1、I hope you are well.

我希望你一切都好。

2、I hope you enjoyed your holiday and are finding it easy to settle back in to work.

我希望你已经好好享受假期并且很快重新投入工作。

3、Thank you for your prompt reply.

感谢您的及时回复。

4、I apologize for not replying sooner, but I have been very busy these last few weeks.

很抱歉没能及早回信，但是过去几周实在太忙。

5、Thank you for getting in touch with us about XXXX. 

非常感谢你关于XXXX联系我们。

6、Thank you for contacting us regarding XXXX. 

非常感谢您因关于XXXX的事接洽我们。

7、With reference to your email of , I would like to bring the following to your attention.

关于你（时间）寄来的邮件，我有几点想跟你说的。

8、As a follow-up to our phone call this morning, I would like summarise the key issues.

关于你早上的电话，我想总结下关键几点。