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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.　　通过一系列艰难曲折，敏国与在北京大学读韩语课程的中国女孩杨雪相遇，同时，民国以他个人的性格魅力结识了峰洙，英姬，勇哲，思郎，与他们共同开始了新的生活，并和杨雪擦出了爱情的火花。但由于自私干练的莲淑与从小爱慕杨雪的张冬的出现，使民国的爱情路上出现严峻的问题……Is it correct to deliberately alienate(6) Other illegal acts with serious social harmful consequences.徐海可不吃这套，我等了两年了，倒是来啊？癫人。In the school, there is only an atmosphere of learning. After all, the school is a place of learning. Every student is working hard to achieve higher results. No matter studying or working, there is competition. In the competition, we must constantly learn from other people's advanced places and how others are to be human, so as to improve our potential. I remember the teacher said before that the university is a small society, but I always feel that the innocence and sincerity are indispensable in the campus. Although it is a university, the students still continue to be students. Contact those senior students who have just graduated, they always team me and say that they should cherish their time at school. In this practice, I feel very deeply that in school, there are a lot of theoretical studies, and they are multi-faceted, almost all-encompassing. However, in actual work, one may encounter the situation that one has not learned from books, or that one may not use the knowledge from books at all.此事之后，梁夕也终于有了一处属于自己的领地——桑曲河。桑曲河位置特殊，处于楚国国境边缘不说，还十分贫瘠，坐落在这里的红薯城饱受各方强盗侵扰，梁夕为了改善红薯城做了各式各样的的努力。在击退了强盗组织红发魔军的进攻之后，为了不坐以待毙，梁夕开始探查在桑曲河的强盗势力的情况，却逐渐发现了七界里流传着的紫薇大帝传说的怪异之处，而这一切又让梁夕有似曾相识的奇妙感觉，让梁夕倍感诧异。