1, that is, promotion to a very high score;

2, or by going up one flight of stairs than before?

If it is 1, there is no good way. You have to think for yourself. It is very unlikely to get a very high score from 30 points in a short time.

If it is 2, there are still some ways. 30 points means that your foundation is poor and there should be a lot of room for improvement.

First of all, 30 points means that your foundation is very poor, so you must read the basic knowledge carefully and master the basic content;

Second, we should understand the basic problems and problem-solving methods that are often done in exams;

Third, do more simulation questions to improve your actual combat level.

If you do it carefully before the college entrance examination, I believe you will improve!