The environment determines the mentality, and I am not used to sitting quietly. The adjustment methods are: 1, go to the library more; 2, go to the toilet first, don't go after going in, don't go if you feel it, and force correction; 3. In the environment outside the library, sit quietly and read books to cultivate your own mentality and emotions; 4. Don't think about it. The more I think about it, the more serious it is. The way you don't want to do is to go to the library with your goal and come out quickly.