为了简洁，同时因为篇幅，教材在表述某些内容时，由于前已有述，往往采用简略的办法概而括之。因此，在教学过程中要帮助学生理解这些内容，就必须引导学生回过头去阅读与此相关的表述，此谓“好马要吃回头草”。比如：高二《哲学常识·上册》在“正确对待矛盾”这一框题中有? For the sake of brevity, and because of the length of the text, when the teaching material expresses certain contents, it has been briefly described because it has been described before. Therefore, to help students understand these contents in the teaching process, we must guide students to go back and read the relevant expressions. This is to say, “Good horses must eat back the grass.” For example, does the “second-level philosophical common sense book” in the second year have the question of “correctly dealing with contradictions?”