关于观察的途径和方法,我们谈了不少。但是,到底什么样的观察才算“有效观察”呢?它有什么标志?也就是说,它和“无效观察”的主要区别在哪里?答案很简单:“有效观察”必须是富有“发现”的观察。大家都去过农贸市场。同一个市场,有的人走一遭 We talked a lot about the ways and methods of observation. However, what kind of observations are considered “effective observations”? What are its signs? That is, where is the main difference between it and “invalid observations?” The answer is simple: “effective observations.” Must be rich “discovery” observations. Everyone has been to the farmers market. In the same market, some people walk