英语书信格式 E To whom it may concern: I am writing to express my deepest appreciation for your prompt handling of my order. I placed a rush order for several books on April 1 asking for delivery to be made by April 15. Well, your company and its employees were so efficient that all the books I ordered arrived here on the 13th! I really do appreciate the trouble you took to meet my request and the special attention you gave to my order. Please convey my thanks to all the staff involved -- they certainly did an excellent job. Best regards, Jack Chen 本文来源：https://www.wddqw.com/doc/e67bef04aa114431b90d6c85ec3a87c240288ac7.html