老板今天早上给我发了一个EMAIL, 说I have been spending a lot of time with the .............. you worked on. I just wanted to thank you for all of your hard work and for doing such a good job on it.前几天他指出好几次我哪里做得不够好, 今天发了这么个EMAIL, 什么意思啊? 我要回他吗? 回什么?