[单选题]41.患者，女性，34岁，患风湿性心脏病，二尖瓣狭窄伴心房颤抖，为防止心房附壁血栓和下肢
静脉血栓形成，在用华华林的过程中，出现突然的自发性出血，此时应用何药抢救（ ）
A.氨甲苯酸
B.肝素
C.华法林
D.维生素K
E.垂体后叶素

{{B}} How to Read Effectively{{/B}}
Many students tend to read books without any purpose. They often read a book slowly and in great detail with the result that they frequently have no (1)______view of what they are reading. (1)______
To read effectively, students are suggested to do the following:
1) To decide precisely on the (2)______ for reading a book. (2)______
2) To decide what they are going to read:
a. The (3)______page should be read first. (3)______
b. The chapter headings are useful in indicating what should be read.
c. The Index can help to (4)______the pages related to some (4)______
information.
3) To read the opening and final paragraphs so that they could know what
a book is mainly about.
4) To ask themselve