医生观察某药对胃出血的疗效,以大便OB的“+”数为观察指标,属()
A.离散型变量
B.连续型变量
C.二分类变量
D.多分类变量
E.有序变量
参考答案:E
— Li Ming looks very weak.
— __________. He has not yet recovered from the illness.
A.So he is
B.So he does
C.So is he
D.So does he
女性,30岁,1年前查体发现右侧卵巢囊肿直径5cm,今晨起突发右下腹痛伴恶心、呕吐。妇检:扪及右下腹肿物增大,有压痛,蒂部最明显,首先的处理是()
A.密切观察
B.急查盆腔磁共振成像
C.抗生素治疗
D.急查血清CA125、甲胎蛋白
E.剖腹探查或腹腔镜检