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10.1.5 After treatment of urinary calculi, no residual calculi and sequelae are qualified.书友们立刻恢复了对《笑傲江湖》的信心，为了女主角能更为惊艳的出场，就算再虐点也可以接受。　金沙滩上迎来了八万落草好汉，断金亭上聚来各路豪杰。聚义梁山的一百零八将，个个性格迥异，光彩照人。他们或是智能超群，有勇有谋，或是除暴安良，行侠仗义，或是大义凛然，忘我行义的好不能等到他们下手，我们再还击，那样的话就会措手不及，失了先机。If I were to implement a pizza ordering system, I would definitely write the code like this, because this kind of code can be written subconsciously without consuming our brains. However, take a closer look at this code: the purpose of this method is to order pizza. However, the code for ordering pizza also needs knowledge about the production of pizza. This method must know all pizza. Worse still, if the types of pizza are to be expanded or pizza with poor sales volume are to be deleted in the future, then the code for ordering pizza will be modified. It looks very bad and should be revised. Our first step must be to separate the code for producing Pizza from the code for ordering pizza, because you should not let the code for ordering Pizza know the logic for producing pizza, but should hand over the logic for producing Pizza to a special type. In this way, we can cope with future changes-if we want to add or delete pizza, we can directly modify the producer of pizza without affecting the logic of ordering pizza.Events replace the work that could only be performed by the scheduled tasks of the operating system, and MySQL's event scheduler can be accurate to one task per second, while the scheduled tasks of the operating system (such as CRON under Linux or task planning under Windows) can only be accurate to one task per minute.