Second, when learning a knowledge point, you may not quite understand what it means. At this time, you need to find a few questions about this knowledge point (note that it is only this knowledge point).
Third, when you are about to face the exam, first make a set of papers over the years to see if there is anything you can't do, and then pick out these questions and brush them specially (note: brush one question several times until you feel clear, and then change to the next one).