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Next, we will talk about the responsibility chain mode. There are multiple objects, each of which holds a reference to the next object, thus forming a chain on which requests are passed until an object decides to process the request. However, the sender does not know which object will process the request in the end, so the responsibility chain mode can be implemented to dynamically adjust the system without concealing the client. Let's look at the diagram first:终于等到杨公子了……几个月没见，赵光头胡子又长了一些，眼神中也布满了沧桑，看来他真的一直没有回去，在此等待杨长帆的消息。……据我所知，你们只是规划了新行省，却并未投入任何建设，我们的要求绝对算不上侵略。因为抚养一名被遗弃的婴儿所产生的爱情故事司令，舰队需要您的指示。　　她仿佛落入了永世轮回的诅咒之中，无法超生……在国外行医多年的女外科医生唐佳瑜，空降北京安和济生医院成立心脏中心，与医务处长欧阳真予不打不相识，和麻醉医生叶弈明渐渐发展为知己。同时，她带领重病组五位成员：秦大中、龙向东、周达、廖小波、江百列共同救治28起罕见心脏病例，并成功研发国产“全磁悬浮人工心脏“，改写了中国心外历史，最终实现自我救赎，收获了幸福的故事。