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Thus, the consumption of one event in the event sequence will affect the distribution of subsequent events.Thromboembolic diseases are currently one of the causes that endanger human health and lead to the highest mortality rate, such as myocardial infarction, cerebral thrombosis, deep vein thrombosis, cerebral embolism, pulmonary embolism, etc. In addition, thrombosis is an important pathological process involved in the pathogenesis of many diseases. 1. Anticoagulant therapy (1) Heparin: Heparin is a commonly used anticoagulant and is a highly sulfated glucosaminoglycan. Heparin is widely found in mammalian tissues, and mast cells are the main producing sites. The main sources of medicinal heparin are bovine lung and pig intestinal mucosa. Heparin used clinically is called unfraction heparin (UFH) because it is a mixture of components with different relative molecular weights. The relative molecular weight is between 33,000 and 30,000, which is also called standard heparin (SH). The drug name is heparin sodium. (2) Low molecular weight heparin: crude heparin is cracked into some fraction with relative molecular mass of 1000 ~ 12000 by chemical or enzymatic hydrolysis methods, and then purified. There are at least 10 kinds of low molecular weight heparin prepared by different manufacturers and different methods.　　他究竟来自何方，他是否脑袋出了毛病，他爱颐指气使，爱捉弄人，爱逞威风，行为带点怪诞，他的性格，他的举止，不知道为甚么，总显得A4.2 Inspection Methods　　1944年6月，联军在诺曼第成功登陆，成为联军战胜的转折点，美军得以将战力转向太平洋，六月登陆塞班岛，七月登陆关岛，麦克阿瑟将军随即又第二度踏上菲律宾国土。日本死守硫磺岛，军力约两万一千人，美军共出动三个师团75000人，舰船495艘，其他尚有驱逐舰，航空母舰等155艘，全力攻击硫磺岛。本纪录片为美军第三司令部摄影队冒死拍摄完成，为当今世上仅存，最忠实纪录第二次世界大战，“血战硫磺岛”之唯一史料！