在空调房待久了，你大约能收到一巴掌凉风，那是物理现象，但真正能跑出一套完美管住逻辑的中央空调，是像后台程序一样不断在重新思索、不断修正。想象一下，你站在大堂走廊，手里拿着一部手机，想按个键让整栋楼冷气全开，要么调高十五度。
这时候，你不仅是在操作一个电器，你是在指挥一个由几十上百个传感器、几十上百个执行器组成的庞大汉诺塔。 整个系统实际上就挂在主板的一小块区域，它像个超级大脑，脑子里存着所有房子的地图、所有设备的脾气性格，还有你刚刚那一瞬间的指令。
这套玩意儿的热力图跟你之前看到的服务器机房不忒一样，它的服务器是贴在墙体内部的，不像那种裸露的机房，那样看着冷冰冰又费钱。我们的空调系统，传感器是嵌在风管里、嵌在回风口里的，执行器则是藏在墙壁、藏在吊顶里的。它不是一台单一的机器，而是一整块电路板，上面布满了成千上万个细小的管住点。 你出门前，把温度设到二十四度，按下开启键。
这时候，主控单元并没有立马发号施令，它起初是在比对。它要算一下，把旁边那间办公室从二十四度降成二十三度，需求消耗多少电？要是这个电费比你自己一晚上的工资还贵，它就会自动拉倒。它得去查，空调外机那边的压缩机是不是过载了，要是压缩机已经在极限边缘转悠，它就不敢再傻乎乎地加电，否则冰箱都要冻坏。
这种深度判断，比你去超市挑货还要复杂，出于它得与此同时寻思能效比（COP）、保修期和未来的维护成本。 有时候你会认定它像个固执的老爷爷，明明你只调了一点点，它却认定全区都要降温。
这时候，系统会启动一个“最优解”算法。它会模拟一万种可能的情况：要是全楼降温，压缩机多耗多少电？要是只降温大堂，回风系统会不会故此喘不上气？它会像下围棋一样推演，找到那个电费和舒适度最平衡的中点。
这个过程叫“优化”，而不是好办的“执行”。你体验到的“忽冷忽热”，往往不是故障，而是系统在反复计算中跳出来的那个“最优解”。 出于在它眼里，温度不是单一的数字，而是一个动态的函数。它知道，早上七点，写字楼里的办公室可能已经动了空调，到了九点，写字楼里又要开暖风。
要是你只按一个固定温度，它就得像个勤快的小明，一秒钟刷新一次全楼的感温探头，重新算一遍当天的最优方案。
这种实时性要求极高，一旦它算错了，比如把办公区误判成了休息区，提前开了大冷风，员工就会瞬间认定不适，系统就得立马报警，重新加载数据。 在这个系统里，你就连不需求去理它是如何改代码的。你能够先看看它是如何把数据存进脑子里的。每一栋楼、每一个房间，它都有个独立的“小脑”。出于一栋楼里的空调和另一栋楼里的彻底不同，它们之间的数据也得兼容。
这就好比把十几把不同人的车钥匙，都拧进同一个保险箱。你按一个键，系统得知道，这不只是是开了空调，而是给了这栋楼一套运行状态码。
这套状态码里，藏着那会儿所有历史数据，比如昨天早上十三点的压缩机转速曲线，今晚九点的预期负荷，还有你刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚刚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