你应该使用正确的书信格式.

You must employ a proper form of letter writing.

完全齐头式的商业书信格式采用开放式或混合式的标点符号，段落之间空行相同。

Bussiness letter with the full block form, along with open punctuation or mixed punctuation , are paragraphed by equal line spaces.

完全齐头式的商业书信格式采用开放式或混合式的标点符号，段落之间空行相同。

Bussiness letter with the full block form, along with open punctuation or mixed punctuation , are paragraphed by equal line spaces .