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One problem with the factory method pattern is that the creation of the class depends on the factory class, that is to say, if you want to expand the program, you must modify the factory class, which violates the closure principle. Therefore, from the design point of view, there are certain problems, how to solve them? We use the abstract factory mode to create multiple factory classes, so that once new functions need to be added, we can directly add new factory classes without modifying the previous code. Because the abstract factory is not very easy to understand, let's look at the diagram first, and then it is easier to understand with the code.年轻产妇柳家惠在医院生产时，临床的一位产妇将自己的女婴和一枚蓝宝石戒指交给她，之后便失踪了。生性善良的柳家惠只好收养了这个女婴，将她和自己的儿子作为一对“双胞胎”带回家抚养成人，并起名叫高小云。这个秘密尘封了二十年之后，偶露端倪。已经出落得清纯雅致的高小云在巴士上当售票员。一天，她在车上勇敢揭发几个小偷，被狗急跳墙的暴徒刺伤，大量失血。被窃的姑娘肖珊珊当即将她送往继母邹萍所在的医院抢救。柳家惠闻讯赶来与邹萍不期而同，两人大惊。[A doctor in Guangzhou issued a document pointing out that "Hongmao Medicated Liquor is a poison from heaven" was arrested across provinces on suspicion of damaging the reputation of commodities]正如张默说的：“我宁可相信，一个像丰珅殷德这样占有欲很强的花心男子，遇到一个喜欢的姑娘后，他也会动了真情，认真去追求这个姑娘，这正是我喜欢这个角度的原因，这很真实。”沥海村就像是一个耗子洞，转瞬之间已是空无人烟。Move　　等兵都走了以后，大伙回到村里，发现村子竟然不仅没被洗劫，街道还被打扫干净，有的家里还留了现大洋作补偿，原来是八路军为了抗日挺进沂蒙山。鬼子真的来了，村里人都藏到了后山里。于大娘的三女儿三妮被日本鬼子强暴后残忍地杀害，村里李继财的媳妇也被鬼子祸害而跳崖自杀。愤怒的村民打死了一个掉队的鬼子。