有关圆锥曲线弦的二端点与原点连线的斜率问题，涉及高中解析几何中许多重要的知识点，具有一定的深度和难度．若用常规方法解决，运算量大，过程冗繁．本文拟通过实例介绍这类问题的简捷求解模式．例1抛物线y-一步与过点M（0，一1）的直线l相交于A、B两点，O为坐标原点．若直 The problem of the slope of the connection between the two endpoints of the conic curve and the origin relates to many important knowledge points in the analytical geometry of high school. It has certain depth and difficulty. If you use conventional methods to solve, the amount of calculation is large and the process is tedious. This paper is intended to introduce a simple solution model for this type of problem. Example 1 The parabola y-step intersects the line l passing through the point M (0, 1) at two points A and B. O is the origin of the coordinate. If straight