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Visitor pattern decouples the data structure from the operations acting on the structure, making the operation set relatively free to evolve. Visitor pattern is suitable for systems with relatively stable data structure and easy change of algorithm. Because visitor mode makes it easy to increase algorithm operation. If system data structure objects are easy to change and new data objects are often added, visitor mode is not suitable. The advantage of visitor mode is that it is easy to add operations, because adding operations means adding new visitors. Visitor mode centralizes the relevant behaviors into one visitor object, and its changes do not affect the system data structure. Its disadvantage is that it is difficult to add new data structures. -From Encyclopedia影视简介王初一与刘十五马上要结为儿女亲家，却因为药材联合社诚信经营的事儿剑拔弩张。十五的毁约令初一损失惨重，赔款、退婚、上门女婿也趁机闹起了分家。而十五也没想到一时的见利忘义竟引得妻离女散，两家自此反目。离婚后的十五另立山头，与初一正面交锋，药王村随之掀起一场轩然大波。初一刚要应战不料也后方吃紧：儿子大力要带十五女儿姗姗进城创业；年轻时的恋人如梦讨债上门，自己纠缠在两个女人之间焦头烂额。而笃信在商言商的十五也遇到了大麻烦，险些被不讲诚信的合伙人坑得倾家荡产。危难之时初一伸出援手，十五汗颜。大力、姗姗的婚礼如期举行。一对老冤家也冰释前嫌，药王村一副花繁叶茂的绚丽图景跃然眼前……都城连续发生职业杀手遭人戕害的命案，包拯（金超群饰演）追查得知乃是杀手之间为了劫掠赏金所构成，而追杀的目的是刑部正在审理重案中的证人齐英。齐英因颇具姿色被江南路都指挥使郑宁奸污，家属与地方父老不甘受辱联名上告刑部，朝廷立即将郑宁免职候审并派刑部巡捕罗北爱护齐英入京作证。郑宁百般狡辩试图脱罪，郑宁的胞姐，后宫郑太妃闻讯急赴开封府衙阻止包拯行刑。双方僵持之际诏书下达，仁宗（王皓饰演）为了维护国法下诏依法惩罚，将郑宁伏法于虎头铡下。包拯亲赴端州查探黎民苦楚，得知广南东路安抚使周卫指使端州知州徐淳设法取得血砚，未料周卫竟派遣官兵勾搭山贼将砚山村围住，不惜屠村并将开封府众人一并戕害。展昭（何家劲饰演）欲保包拯逃遇险境，但包拯不忍置全村村民于不顾而严辞拒绝，集开封府众人之力与村民分进合击，招架贼人，终获告捷，并将周卫依法入罪。Hallucinations-Like dreams, usually strange feelings produced by the brain out of thin air. It can be divided into three types: auditory hallucination (hearing sounds that do not exist), visual hallucination (seeing people or things that do not exist) and tactile hallucination (touching things that do not exist).七十年代的京剧信息团，宋雨和邢涛是一对情窦初开的恋人，一场突如其来的大火烧死了邢涛的父亲邢文江和叶1日凯的妻子于晓霞。两个家庭因为这场大火反目成仇，也改变了这对恋人之间单纯的关系。因大火，宋雨的父亲宋德海入狱，宋雨被开除。不甘心的宋雨并没有放弃回到剧团的渴望，终于在一次借调演出后又被调回剧团。当年的大火一直在她心头燃烧，这场火充满了疑问和悬机，她想解开这个谜。剧团的演员怀着各自的目的加入到查案追凶当中，最后发现，凶手只是死者本人。在欲爱不能的岁月，他们选择了死亡。当一切真相大白，宋雨和邢涛牵手，把剧团带出了困境。张无忌在悬崖下的确捡到了传说中绝世无敌的《九阳神功》，可是这部绝世神功，似乎没有改变张无忌悲剧的命运。