为明确吐血的病因，应做下列哪项检查
A．内窥镜
B．血气分析
C．上消化道钡餐造影
D．B超
E．胃液分析
参考答案：A,C,D,E
It being Sunday, I ______ up early this morning, so I stayed in bed until 9 am. [ ]
A. didn't need to get
B. couldn't have gotten
C. needn't have gotten
D. mustn't have gotten
下列哪项在急性脊髓炎急性期治疗措施中是不必要的（）
A.糖皮质激素
B.20%甘露醇定时应用
C.选用适当的抗生素
D.处理排尿障碍及防治尿路感染
E.防治压疮
