When I graduate from college, I want to write a thesis. One of my brothers spent a week writing his graduation thesis. His tutor asked him: What knowledge did you use to write this paper? The younger brother was speechless (nothing was useful), and the tutor asked: Then why did you learn this knowledge? Senior brother still couldn't answer, and the tutor said, "If it is high school, can you learn?" So all the knowledge you learn is to cultivate your brain's thinking ability ... "This is understandable, but you can't say it ... Hehe ... I hope it will be useful to you.