应用文写作范文精选感谢信范文:To Whom It May Concern, As a student of this university, I would like to take the opportunity to express my appreciation for your kind assistance as always. Meanwhile, I feel that it would be beneficial to express my views concerning the quality of the library service. In the first place, I find that most keyboards of the library computers are in poor operation, which brings much inconvenience to the users. I would also recommend the library to improve the efficien