我是睡觉大王
商业信件的结尾，通常要有sign off和signature block，sign off要注意只有第一个字需要大写!下面提供一些最常看到的sign off：Sincerely,Yours sincerely,Respectfully,参考句型：Thank you for your (appreciated) support.Thank you for your help in advance.Thank you for your patience.Thank you very much for your support on this issue.Thank you for your attention.
