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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.5 Visibility is less than 50m. When fog lights, dipped beam lights, position lights, front and rear position lights and hazard warning flash lights are turned on, the maximum speed is 20km, and leave the expressway as soon as possible from the nearest exit.不过我们没空看好戏，因为南方还有我们的舞台。220. X.X.253Next, we will listen to the onchange event in the drop-down box of colorSelect and the oninput event in the numberInput input box respectively, and then make corresponding processing in these two events.泰剧《同拳异梦》Border breakout is a brand-new "hero free competition" model to be launched by "the glory of the king". This mode involves 100 summoners, who can fight each other alone or in teams on a brand-new battlefield the size of about 150 King's Canyon maps.