It is not enough to look at the real questions in the comprehensive mathematics review. It is suggested to take systematic classes or do some books corresponding to comprehensive counseling. There are fewer real questions, from 1997 to now, it is more than 20 years. It is difficult to do these problems from quantitative change to qualitative change. It is suggested to take some classes first, or do some problems systematically, and then do the real problems. Especially for students who have poor math foundation or need to get high marks, math still needs to work hard.