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Speed (Node)2017-07-15 13:39:33还是让他好好想想吧。Responsibility chain mode-A request needs multiple objects to process, thus avoiding the coupling relationship between the sender and receiver of the request. Connect these objects into a chain and pass the request along this chain until an object processes it. The specific structure diagram is as follows:The newspaper said: "The total number of cancer deaths in the United States showed a downward trend for the first time in 2005." "Cancer is a chronic disease that can be treated, controlled and even cured." In the past, it was believed that cancer would lead to death, and it would take less than three months. Now it is believed that cancer is a chronic disease that can be treated, and the treatment method will change with the change of understanding. The decline in the death rate of cancer patients in turn proves that this change of understanding is close to the right direction. Western medicine came from the West. At present, the number of cancer survivors in the United States is 1/29 of the total population, while that in Shanghai is only 1%, which is far from other places. This shows that Shanghai's understanding and treatment of cancer are still shrouded by the shadow of past mistakes. Many innocent lives still die under the wrong medical understanding and medical methods.