D) Practicality and skepticism. When looking at shallow reference books or looking up materials on the Internet, you should type (copy or copy) the code and run it yourself. You should modify other people's source code more and put forward your own opinions: why is the book not designed like this and why is it designed like that? What if you add some methods, method parameters, or member variables? You must do it yourself, at least run it. In addition, we should dare to ask questions and make bricks to bloggers. You can even question the commentary and intention of some chapters of GoF, not to mention some bloggers.春秋末年，吴国和越国因战争结下仇怨。吴王夫差为父报仇，在伍子胥的辅佐下日夜勤兵。，降吴为奴。 勾践从此为吴王养马、拉车，为了复国的大志受尽屈辱。苟且偷生中，默默等待着。 伍子胥认为不杀勾践必留后患，夫差却不以为然，一个亡国的奴隶，是翻不起什么大浪来的。 太宰伯噽向夫差荐上越女西施。在伯噽府，夫差见到了美丽绝伦的西施，为她的美貌所倾倒。 伍子胥劝说吴王，切不可相信勾践。但勾践的谨慎行事，使得吴王渐渐地放松了警惕，伍子胥的所有谏言也被他当作耳旁之风。勾践和范蠡在暗中逐渐得到了转机，并被夫差准予回越国。回国后勾践仍然谨慎从事，一点一滴地积蓄力量，休养生息。 伍子胥一再阻拦意欲北进做霸主的吴王，最终却被夫差赐死。吴国实力顿时削弱。勾践终于得到了机会，举兵复国。 姑苏破城之日，勾践率大军在伍子胥自刎之地向其致敬。败于勾践之手的夫差也拔剑自刎。 越王勾践，终于历经十数年的卧薪尝胆、韬光养晦、励精图治，实现了复国的宏愿。Let's understand such a problem first, If our front-end development needs are the needs given to us by the demand side, It is possible that a front-end developer will deal with multiple demanders, Therefore, it will keep in touch with multiple demand parties. Then in the program it means keeping references to multiple objects, The larger the program, There will be more and more objects, The relationship between them will become more and more complicated. Now if there is an intermediary (if it is our supervisor) to meet the needs of multiple demanders, Then the demander only needs to give all the requirements to our supervisor, who will assign tasks to us according to our workload in turn. In this way, our front-end development does not need to contact with multiple business parties, we only need to contact our supervisor (i.e. Intermediary), which weakens the coupling between objects.So let's explain the rules of iptables in a common way. There was an analogy before, Each "chain" is a "checkpoint", Every message passing through this "level" must match the rules on this level. If there is a match, The message is processed correspondingly, For example, you and I are like two "messages" at the moment. Both of you and I are going to enter the customs at this moment. But the duke has a life, Only the imposing person can enter the customs, Those who do not meet this requirement are not allowed to enter the customs. So the soldiers guarding the customs followed the "rules" formulated by the duke. I began to look at you and me. In the end, you entered the customs smoothly, and I was rejected. Because you met the standard of "dignity", you were "released", while I did not meet the standard, so I was not released. In fact, "dignity" is a kind of "matching condition", "release" is a kind of "action", and "matching condition" and "action" form the rules.该剧将围绕2011年NBC播报的真实犯罪新闻Betsy Faria谋杀案的背后故事展开，Russ Faria谋杀了妻子Betsy Faria，而这一案件则与美国妇女Pamela Marie Hupp2016年在密苏里州奥法伦市的家中谋杀了Louis Gumpenberger交叉在一起，Hupp被判处无期徒刑。Villagers: Do you think one is from the countryside and the other is a reporter from Beijing? Can this last long?[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]
