I think the points in the book are good, the knowledge points are comprehensive, and the exercises are graded from easy to difficult.

Textbooks are the main source of knowledge for students, and many students think that they can learn well as long as they understand what the teacher says in class.

In fact, it is not enough to really understand, but also to make full use of relevant extracurricular books to deepen, expand and integrate the knowledge learned.

Self-study the missing knowledge, lay a solid foundation of knowledge, so that the knowledge you have can keep up and adapt to the study of new textbooks.