Comprehensive. Searle's leap is bound to brush the question, and the idea of writing the question is very special. He has thoroughly and carefully investigated the neglected fuzzy knowledge points. "Lay a good foundation" and "just do a good job" are also ready, and the combination of study and practice is the key. Through these two textbooks, Mr. Schell will help you simplify the complex, integrate knowledge points, combine teaching with practice, take you step by step to find the important and difficult points and form a knowledge framework.