I read an article about the power of "thank you",which is very impressive.In this article,it tells a girl who is in her inferiority but very polite,for she sits in the most-unattentioned seat in the classroom,rarely others would pay attention to her.However,every time one does do her a favor,she is willing to say "thank you".Some of her classmate are tired of this,but they start to notice her.As a result,after one term,she have got a lot of friends in the class.
From my viewpoint,saying thank you may impressed others deeply and powerfully.So,let's get ready to say thank you anytime and use the polite items,by doing this can we certain to show others a good image.