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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.The Second World War was the war with the largest number of casualties in history, with a total of 55-60 million dead and 130 million injured, totaling 190 million dead and injured. The following are the casualties in major countries:舞蹈演员李蓉马上要迎来自己的首场演出，跟男朋友曲折也情投意合，准备结婚。在她的事业和人生都要掀开华彩乐章的时候，打击随之而来——就在演出即将开幕之际，双方碰面才知他们竟然是旧识，而李蓉的母亲徐青大失常态，坚决反对他们的婚事。李蓉和曲折拼命抗争，因此，那一段真实的历史被逐渐翻开……陈老爷急忙点头道：是啊，是啊。A4 is a structure pointer and should hold the current status information of Tank (MSG parameters, not posted).3. The supervision of students is relatively weak and the sense of learning scenes is low.而在未来的很长时间内，自己的重心主要放在北上的中原江淮一带，在此之前必须先处理掉后方的这个威胁，绝对保证后院的安宁。