—Where _____ your food?—I only have two hamburgers. They ____ on the table.

A．is; is

B．is; are

C．are; is

D．are; are

男，28岁，2天来排柏油样便8次，今晨昏倒急送医院。以往无上腹痛及肝病史，近期无服药史。体查：血压8．0／5．3kPa（60／40mmHg），脉搏130次／分。应首选的措施是（）.

A.口服抑酸药

B.补充血容量

C.冰盐水洗胃

D.口服去甲肾上腺素

E.立即内镜检查并行镜下止血