抛物线是常见的圆锥曲线,在高中数学中通常是利用解析几何的方法来研究抛物线的。但是,我们在平时的教学过程中往往侧重于把一个几何问题代数化,学生拿到几何问题第一想法就是建系,进行坐标运算,往往把一些很简单的问题弄复杂了,有时候在解决问题的过程中适当地利用纯几何的知识可以减 Parabola is a common conical curve. In high school mathematics, the parabola is usually studied by analytical geometry. However, in the ordinary teaching process, we often focus on the problem of algebraicizing a geometric problem. The first idea for students to get a geometric problem is to build a system, perform coordinate calculations, and often complicate some very simple problems, sometimes solving problems. The proper use of pure geometric knowledge in the process of the problem can be reduced