Observer mode:
What we understand is that if a single schema is instantiated, it will only be instantiated once. To implement a single schema, we simply use a variable to identify whether the class is instantiated. If it is not instantiated, then we can instantiate it once. Otherwise, we will directly return the instantiated object.
DDoS Attack and Defense: From Principle to Practice (Ⅱ)
郝运来由村长当上油坊营子乡的副乡长，为了乡里的经济发展，他辛辛苦苦地跑项目，而其他的两个副乡长却紧盯着乡长的职位，不干实事。原来的乡长调离后，县里任命郝运来为代理乡长，两个副乡长心里十分不平衡，尤其是黄副乡长，处心积虑地要把郝运来整倒。于是在他的策划和指挥下，村霸胡全和胡二用尽了可能的手段来整郝运来。他们先是送了郝运来1万元钱，想事后告他受贿；又找人砸了几家饭店，嫁祸郝运来；还告他偷税漏税以及窝藏违反生育指标的小姨子。郝运来在黄的诬告下被停职反省，黄上台后大搞形式主义，谎报政绩，还把胡全聘到了派出所。群众的眼睛是雪亮的，黄的一切算计最后宣告破产，郝运来的代理乡长职务得到恢复。在郝的主持下，乡里的重大引资项目矿泉水厂终于奠基。
Mediator.workAll ();
Ensure that MDT team can timely understand the implementation of MDT diagnosis and treatment suggestions in clinical practice;
In order to expand their knowledge, Expanding contacts with society, Increasing the individual's experience in social competition, Exercise and improve their potential, so that they can really enter the society after graduation, and can deal with all aspects of problems well in life and work. We took part in this social activity with the same dream. We experienced happiness in the activity and learned more knowledge in the activity. In the activity, we went deep into the hearts and minds of the people! We went deep into the countryside to understand the people's feelings. I really feel very honored to take part in the summer vacation "Three Rural Areas". Although it was a short span of more than ten days, it was a completely different experience.
顾涧轻拍了下桌案，道：前岷州知府张杨，在岷州呆了将近六年，在农事方面实行了各项举措，政绩卓异。
当然了若是韩信本人亲自率领大规模军队前来也是个棘手的事情，如今李左车率领十万兵马前来，可以说是最为完美的。
公子在番邑的壮举我有听说，如今在项梁将军会下，来日定然前途无量。
If a source address is repeatedly disguised, the address will be quickly detected and filtered out. In most cases, using many different source address camouflage will make defense more difficult. In this case, the best defense method is to block spoofed packets with similar source addresses as much as possible.
张家兄弟姊妹以为是爹娘安排的。
李少蓉，美丽、高雅，交响乐团的第一大提琴手。为了从记忆中抹去当年的伤痕，她全身心地投入到练琴中，但是她却怎么也无法忘记未婚夫施敬。所以三年来，她没有再谈过恋爱。
老鳖并不认为自己说错了，只当葫芦害羞，于是嬉笑道：眼下不是，过几年不就是了。
郑家大少爷怎么戴绿帽子了？这还没娶媳妇呢，就守不住了。
Source: Zhihu
柳芸芸住在一栋父母留下的花园洋房里，因为受够了日复一日机械的工作，她决定，将房子低价租出去，招聘一群各有特长的的室友一起在宅内创业，机缘巧合之下，一群各有特长的失业青年走到了一起，追逐自己的梦想，并发生了一系列有趣的故事……
We can understand that the responsibility chain mode is a chain composed of processing requests. Requests are passed between these objects in turn until we encounter an object that can process it. We call these objects nodes in the chain. For example, object a sends a request to object b. If object b does not process, it will give the request to c. If object c does not process, it will give the request to d, and so on, until one object can process the request. Of course, if no object processes the request, then the request will leave the chain.
MDT policies, guidelines and regulations are reviewed at least annually.
