This book is very helpful to the study of mathematical analysis.
Let's put it this way: after I graduated from college, I collected this book for 20 years and passed it on to my son, who later became a master of mathematics and a doctor of statistics. After my son learned mathematical analysis well, he sent the book back, I lent it to the students, and the students passed it on. People who have used my set of books, not doctors, are embarrassed.
The point is that they cherish it because they like it.
When using, do what you can, do something, and do something wrong. Refuse to be short-sighted and don't guess questions. Especially in the process of solving problems, think more about' why?' When dealing with basic skills such as construction and renovation. .
All roads lead to the same goal, and the teacher grew up doing this set of books.