After reading a lot of questions, there is no need to do every familiar question, and then do it seriously when you meet something you are not good at and are always wrong. Think about the way to solve the problem in your mind before you do it, and then solve it to see if it is right. If it is right, find two more ways to solve it according to the same idea. If the correct rate can be guaranteed, this kind of problem can be considered as. Write it down in a notebook and solve it again every three or four days. When you look at the problem next, you can focus on what you don't know, instead of what you think will.

Problems that cannot be solved should also be classified. Don't be greedy. It is much more cost-effective to solve one kind of problem than to spend a lot of time solving three kinds of problems. If you prepare for the mid-term exam, you won't. Don't worry, don't be afraid. You will always know more than you do now. If you are nervous, you will get all the answers wrong, and you will lose a lot.

In other words, what you can get is yours, and they are the real focus of you. On the premise of ensuring that everyone can get points, sprint those who can't.