It is suggested to use the Mathematics Review Encyclopedia edited by Li Yongle in the first review stage. This has a good foundation. I suggest you do it again and try to do every question well. It's easy to forget what you saw. Buy some real questions later, and do this at least twice. If you think it's good, you can buy some simulation questions and suggest Li Yongle's, which is a bit difficult. The book edited by Chen Wendeng is also good, but it is a bit difficult.