help with NIW RFE

Hello everyone. I just got RFE (NIW DIY CSC) and need some advice on a few questions. I heard before from this board that RFE shall be responded right before the deadline. The earlier, the worse. Is it so? Also, shall I just answer the question that I was asked or I should make another long petition again? I feel I probably should just answer the question and provide whatever new evidence I have (such as new education, new publication) but am afraid that makes people feel I am too skimpy. Thanks for any advice.