Stick to it, many things will grind, and persistence is victory. It's time to test your perseverance. Don't be pessimistic in the face of setbacks, don't lose heart, use your head and think more. Being admitted to a university means that you have a certain learning ability. The same is true of universities and junior high schools. First, read your textbook carefully, explain the knowledge clearly first, and then solve the problem by methods. If this method doesn't work, you can always find the right way to solve the problem. So, don't be discouraged, believe. Come on!