High school mathematics thinking method is required to be higher and better. The first volume is difficult. The topics involved in higher and better high school math books are mostly adapted from competition questions or advanced mathematics. These topics are often slightly more difficult than the college entrance examination questions, and are suitable for students who are proficient in knowledge, active in thinking, strong in understanding and strong in self-study. If students don't master the knowledge in class, their math scores are not ideal at ordinary times. It is not recommended to study this book in depth, and it is just as well to flip through it.