Specifically, you need to check the relevant professional requirements yourself, whether it is one of the best or three books. It will be September in a few days, so calm down. If it is a full-time postgraduate entrance examination, make good arrangements for the next time. This year's political program has also changed a lot. Mathematics needs time and methods. Now I recommend Li Yongle's book review, which I think is good, as well as his real book, 400 questions and the final sprint.
What the postgraduate entrance examination needs is determination, perseverance, perseverance and persistence, and basically you can get better results.
I hope you can realize your dream of becoming the number one in the world next year.