Reference answers generally don't say "a=2 from (1)" is 3 points, in which "a=2 from 1" is 1 ... Many conclusions in the previous reference answers I have seen are directly used, especially an intuitive conclusion that the number is equal to, so I hardly need to emphasize it.

Let's just say that you got 100, and the teacher didn't want to get full marks. If you have to find a reason to deduct a little, you will deduct a point ... The teacher of the big exam is too tired to care about this deduction, but it will be some specific knowledge points. Let's discuss how to give points.