每一个数学问题都有它自己的结构、形态等特征,有时直接求解似乎很难,但通过直接分析或变形后间接分析题目结构,抓住某些特征信息之后,解题思路也就清楚了.因此,重视捕捉数学问题的特征信息,攻其要害,是寻求数学问题巧解的一个重要策略.本文举数例加以说明. Every mathematical problem has its own structure and shape. Sometimes it seems difficult to solve it directly. However, by directly analyzing or deforming the topic structure indirectly and grasping certain characteristic information, the problem-solving ideas are also clear. Therefore, paying attention to capturing the characteristic information of mathematical problems and attacking the key points is an important strategy to seek solutions to mathematical problems.