书信是很讲究格式和客套的一种应用文,而且书信以“你”第二人称来写,好像双方面对面谈话,所以它应该是最有真情实感的应用文。书信我们常写,但并不是每个人都能非常规范地掌握它的书写格式。 Letters are an application style that emphasizes formatting and patronage, and letters are written in a second person called “you”. It seems that the two parties talk face to face, so it should be the most sensible application. Letters we often write, but not everyone can grasp its writing format very standard.