[概述]5﹒感谢关照（Appreciation for being taken good care of）

Dear Professor . . .，I wish to extend my deepest appreciation to you for welcoming my colleague Mr . . . .，chief technician of our electromicroscopy laboratory while he was an observer in your department .亲爱的× × ×教授：我的同事，电子显微镜实验室主任技师× × ×先生，在贵系访问期间受到热烈欢迎， ......