在冯小刚导演的《唐山大地震》里，有一段这样的故事：当灾难降临的时候，母亲只能选择救两个孩子中的一个，不知道救男孩还是救女孩的母亲，最终回答：“救弟弟”。 最终捆绑住我们的，是内心的私欲，还是道德的枷锁？

In the film The Tangshan Earthquake directed by Feng Xiaogang, there is such a story: When disaster fell, the mother could only choose to save one child among two children. The mother who had no idea which one she should save, the boy or the girl, finally answered, “save the younger brother.” It is selfish desire inside or moral chains bound on us?