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We can understand that the responsibility chain mode is a chain composed of processing requests. Requests are passed between these objects in turn until we encounter an object that can process it. We call these objects nodes in the chain. For example, object a sends a request to object b. If object b does not process, it will give the request to c. If object c does not process, it will give the request to d, and so on, until one object can process the request. Of course, if no object processes the request, then the request will leave the chain.幕后花絮：Alter database example set multi_user讲述了“万年课长”失败老爹和前黑社会老大转生为“花美男店长”和“绝世美女”重返人间后引发的一系列故事。重生的他们历经又一轮的人生了解到各类事情的真相，领略了什么才是真正的爱情和幸福，将为观众献上感动与欢乐[4] 。In the previous example of electric lights, a state mode program was completed. First, the Light class is defined, which is also called Context here. Then in Light's constructor, to create instance objects for each state class, Context will hold references to these state objects in order to delegate the request to the state objects. The user's request, that is, the action of clicking button, is also implemented in Context, with the following code:《国土安全 Homeland》的幕后Patrick Harbinson为ITV开发小说改编的3集剧《塔楼 The Tower》，根据Kate London小说改编的《塔楼》讲述一名老巡警及一名少女从伦敦东南部一座塔楼坠落身亡，而在屋顶上的五岁孩子及新人警官Lizzie Griffiths则双双失踪。　　警长Sarah Collins被征召加入调查，她努力搜索Lizzie，但却发现背后隐藏着的可怕真相。在小说系列里，Lizzie Griffiths及Sarah Collins是重要角色。城南市的击剑馆内，首富荣义翔（王奎荣饰）的公子荣维志（李竹饰）被一伙丧心病狂的黑社会份子暴打。维志受伤脱逃，巧遇俞雪儿（冯春哲饰）搭救。而俞雪儿父亲苦心经营多年的产品“金兰”系列在亚洲博览会上荣获金奖，满心欢喜的俞敏之（奚美娟饰）正是在这时候让女儿俞雪儿去机场迎接捧奖归来的父亲，不幸的是其父突遭车祸去世，企业面临破产的边缘。为争夺“金兰”品牌荣义翔指示其远房兄弟荣义飚准备强行霸占华韵。与此同时，瑞丰公司华诗远（马光泽饰）也产生了与华韵合作的意向。于是三家公司开始了残酷的争夺战。荣义飚让维志深夜潜入华韵化验室盗取绝密资料，黑暗中他将雪儿打昏。