有的同学在思考问题时，有时头脑中会出现一片空白，这是怎么回事呢？人在思考时，大脑要进行一系列复杂的加工过程当这种加工遇到一定的障碍，或者由于长时间加工而使大脑过度疲劳，都可能会出现上述所说的“空白”现象具体来讲，这种空白现象有如下几种原因：（1）刺激物出现 When some students are thinking about problems, sometimes there is a blank space in their minds. What is going on here? When people are thinking, the brain needs to perform a series of complex processing processes. When the processing encounters certain obstacles or the brain becomes overtired due to prolonged processing, the aforementioned “blank” phenomenon may occur. There are several reasons for this blank phenomenon: (1) The appearance of irritants