If you are careless, then if you want to be careful not to make mistakes, you must first concentrate, concentrate, and then concentrate; If you want to concentrate, you must first be calm and calm. Usually, no matter whether it is an exam or a problem, as long as you sit at your desk and start studying, you should tell yourself to concentrate, concentrate, take a deep breath, concentrate on doing a problem, and deliberately refrain from shielding interference information.
If there is a loophole in knowledge, we should make it up quickly.