《中小学数学》(初中教师版)2006年第1—2期刊载了周晓玲老师的《从“苏珊去学校的最短路径”谈起》(下称原文)一文,从苏珊去学校的最短路径出发,阐述了用标数法解决“纵横路线图”问题,并把这种方法用于求解概率问题,解题思路新颖、独具匠心,对拓宽思维很有帮助.但美中不足的是文中分析含糊,与“纵横 ”Primary and Secondary Mathematics“ (Junior High School Teacher Edition) 2006 Issue 1-2 Journal contains the shortest path from ”Susan to school“ by teacher Zhou Xiaoling. ”Talk" (hereafter referred to as the original), went to school from Susan. Starting from the shortest path, the paper expounded the problem of solving the “Landscape and Route Map” problem by using the scalar number method, and used this method to solve the probabilistic problem. The idea of ​​solving problems was novel and distinctive, which was helpful for broadening the thinking. However, the only drawback is that The analysis is ambiguous in the text, and