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Avoid coupling the sender and receiver of the request, make it possible for multiple objects to receive the request, connect these objects into a chain, and pass the request along this chain until an object processes it. This is the responsibility chain mode. In the responsibility chain mode, it is possible for each object to process the request, thus realizing decoupling between the sender and receiver of the request. At the same time, the responsibility chain mode simplifies the structure of the object, which makes each object only need to refer to its successor without knowing the whole chain, thus improving the flexibility of the system and making it more convenient to add new request processing classes. However, we cannot guarantee that all requests can be processed in the responsibility chain, and it is not conducive to observing runtime characteristics.Only the outer world is special.消防和救护人员的工作，由烈焰火场、暴风水灾，到荒山野岭、高空水底…一般人迴避之处，却往往成為他们奋力救援的地方；险境中，施救者和被救者，生命经已在无形中紧紧相繫。香港电台电视部与香港消防处联手製作的《火速救兵IV》，继续以真实个案為蓝本，改编成十集半小时的电视剧。故事涉及一些近年备受关注的消防事故和议题，包括十号颱风下上山搜救行山人士、大型交通运输事故及旧式工厦防火安全问题等。对於普罗大眾而言，可能很多平日在火海、灾场中救火救人的消防和救护人员，都不过是「无名英雄」。这些在灾场中英勇救人的錚錚铁汉，其实和你我一样有血有肉，在肩负重任的背后，随时隐藏著一些不為人知，但却扣人心弦的动人故事和情感。透过真人真事改编的《火速救兵》剧集，却反映了这些「无名英雄」更為真实、有血有肉的一面。2018年刚好亦是香港消防处成立一百五十周年，新一辑《火速救兵》，正好让大家了解最新的消防资讯，加强防火意识。另一方面，杨长帆本人也以特殊的形式介入科举办学之事，亲自著《物理学》、《机械原理》、《化工学》等数本基础理论书籍，并组织集合汇编《建筑》、《造船》、《制铳》、《冶铁》等数门匠术典籍，方便学习与教授，虽然在缜密程度上有所欠缺，但在苔湾，多门技术的冲撞之下，诸多学府学者努力之下，终于有了些科学的雏形。那天选泥鳅后，她就已经丢开敬文哥了，如今因为跟刘家闹翻了，再跟敬文哥接近，她自己也要鄙视自己。有点懒又有点馋的熊二虽然总是各种失误犯错，内心却一直梦想成为一位英雄，以此获得大家特别是哥哥熊大的认可。(4) The list of employees of the branch and their ID cards, the qualification certificate of registered fire engineers and their social insurance certificates, the professional qualification certificate of special types of work in the fire protection industry, and photocopies of labor contracts;