大咯血窒息时,最关键的措施是()。
A.立即进行人工呼吸
B.立即使用中枢兴奋剂
C.立即使用鼻导管给氧
D.立即采取解除呼吸道阻塞的措施
E.立即输血或输液
参考答案:D
关于HELLP综合征,下列哪项是正确的()
A.孕期贫血、血小板减少时,应考虑此病
B.多在产前发生,产后发生伴有肾功能衰竭和肺水肿者,则危险更大
C.仅在妊高征中特发此病
D.一旦诊断,应立即剖宫产
E.剖宫产多选用硬膜外麻醉
Which of the following is not among the basic features of a relational database
A. It does not matter what order the rows are in.
B. It does not matter what order the columns are in.
C. Different columns should have different column names.
D. Different columns should have different data types.