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Well, we've reviewed the concept of rules, And it has been understood that, A rule consists roughly of two logical units, Match conditions and actions, It is useless to say so much, Let's define a rule by hand. Here, we still take the INPUT chain in the filter table as an example, because the filter table is responsible for the "filtering" function, and if all messages sent to the local machine need to be filtered, they will first pass through the INPUT chain (PREROUTING chain has no filtering function), which is very similar to the "entry" scenario we refer to. Therefore, using the INPUT chain in the filter table as an example is helpful for us to understand.众人纷纷开言，气氛忽然就轻松起来，仿佛只要他们三人往老将军床前一站，老将军就会清醒过来。Set the position and quantity.　　李尚允饰演男主人公徐道宇，是一名建筑学专业的讲师，拥有总是能令人愉快的性格。徐道宇与妻女享受平凡的生活，突然卷进某件事件中，陷入困顿，并且崔秀雅也慢慢渗透进他的生活。6 p: M # E "w 'l' d3] * L34, Strengthen the training of store personnel. In order to better lay the foundation for the next step, the company should consider the weaknesses of store managers in operation and management, especially in operation, which will greatly affect and restrict the next step of operation and management. It is suggested that the company can consider the long-term development, arrange the store personnel to learn and train the management knowledge, improve and enrich the knowledge, and better pave the way for the next operation.