For science students, I think the most important thing is synchronous training! Synchronous training! If you do it, you're done. 80% or 90% of it comes from the inside. Even if it's not exactly the same, the problem is similar. I must have done it at ordinary times, but I brought it with me when I reviewed it. It's basically the same. For liberal arts students, it is better to start endorsing early. You can borrow notes from your seniors, or you can directly ask your tutor for courseware. This is a liberal arts course. If it's high school math or something, you can borrow some final questions from your seniors last year. It is really useful to read more books in specialized courses. You can ask the teacher which chapter you don't understand, but it is more efficient to go to the mile to find the corresponding chapter of the corresponding course directly. Of course, books are also focused, and teachers will emphasize or imply when they speak. For non-key chapters, as long as you master examples and knowledge points, you don't need to delve into them. In short, studying hard at ordinary times is safe! ! !