一、引言近年来,校园伤害事故频发,尤其是连续几起凶手持刀闯入幼儿园杀害儿童惨剧的发生,使整个中国甚至世界为之触目惊心。这些惨剧的发生,固然是由于整个社会大系统在运行中出现的很多问题所致,例如:贫富差距和社会不公等。 I. INTRODUCTION In recent years, there have been frequent accidents in schools. In particular, there have been several tragedies of kills and nuisances in kindergartens held by successive murderers in order to shock the entire Chinese and even the world. These tragedies happen not only because of the many problems that arise in the operation of the entire social system such as the gap between the rich and the poor and social injustice.