We must persist in doing appropriate exercises every day, especially key and hot topics, to prevent ideological degradation and laziness, and to keep our thinking flexible and smooth.

Especially during the review period, we should master the time allocation of watching and doing well.

In short, review requires teachers to carefully design examples and exercises, so that students can feel that supplementary examples and exercises are not boring repetitions, thus stimulating their interest in review and satisfying their knowledge, so as to get twice the result with half the effort.