Doing problems, like doing things, has a cognitive process. Many times, it's not that you don't know what to do, but whether your psychological hesitation is correct. Finally, your hesitation delayed the answer time or you hesitated and finally chose the wrong one. Then I suggest you buy a lot of exercises to correct this, put a big tick on the subconscious mind with a red pen if you do it right, and put a big X on the wrong question. If you really master the current knowledge points, this revision will greatly reduce your hesitation in doing the questions and improve the efficiency of answering questions. If you really don't have a good grasp of knowledge points, then this needs to be strengthened through basic exercises. There is never a one-step method to do anything, but you can do it with a solid foundation.