追踪“为什么您一开始就知道李东辉同学在教学楼摔伤了?”找到昨天夜里发现李东辉并送他去医院的保安,程澈拿着小本子,目光锐利地盯着保安提问。学校的保安虽然有安排值夜班,但是学生和老师们都离校后,学校里一般没有外人闯入,因此,保安值夜班时极少巡逻,也就是在保安室里看看电视打发时间。所以,整个学校只有保安值班室亮着灯,教学楼、实验楼等地方都是漆黑 Tracing “Why did you know Li Donghui from the very beginning that his classmates had been injured in the teaching building?” "I found the security guard Li Donghui who was found in the night and sent him to the hospital. Cheng Cheh took a small book and stared at the security question. Although there are night-time arrangements for the security of the school, when the students and teachers leave school, there is generally no outsider to break into the school. Therefore, the security guard rarely patrols during the night shift, that is, watching the TV pass in the security guard. Therefore, the entire school only security lights lit duty room, teaching building, laboratory building and other places are dark