开门见山说明来意就行. Dear xxx: Many thanks for the insightful comments and suggestions of the referees.I have made corresponding revision according to their advice.Words in blue are the changes I have made in the text(为了便于审稿人重审,一般把修改过的地方用醒目颜色标出). 按照审稿人的意见逐条进行了修改 The following is the answers and revisions I have made in response to the reviewers' questions and suggestions on an item by item basis. 1. 2.