一求解方法1.分类(“和”的思路):把问题分成若干类,用分类计数原理处理.分类时要做到不重不漏.2.剔除(“差”的思路):对有限制条件问题,先从总体考虑,再把不符合条件的所有情况剔除.3.特征分析:常用立体几何概念或其图形分析.4.构造法:构造几何模型.二例题讲解例1空间有10点, A solution method 1. Classification (“and” ideas): The problem is divided into several categories, using the principle of classification and counting. The classification should be done to avoid ignorance. 2. Excluding (“bad” idea): There are restrictions Conditional problems, first consider the overall situation, and then remove all the conditions that do not meet the conditions. 3. Feature Analysis: Commonly used solid geometry concepts or its graphical analysis. 4. Construction method: Construct a geometric model. Two examples of examples to explain Example 1 space has 10 points ,