急性机械性小肠梗阻常见的临床症状有（）
A.阵发性腹部疼痛
B.恶心、呕吐
C.血便
D.腹胀、腹部不适
E.肠鸣音亢进
参考答案：A, B, D, E
补全对话：根据对话内容与上下文，在空白处填入适当的词，使对话意思完整。每空只填一词。
A: Can I 1______ you?
B: Yes, please. I want five stamps.
A: OK.
B: I 2______ five envelopes, too. I want to 3______ some letters. Do you have some?
A: Sure. Here you are.
B: 4______ 5______ are these things?
A: Five yuan, please.
B: Thank you.
清洁肠道，通常不用哪种药物()
A．胃服安
B．甘露醇
C．番泻叶
D．蓖麻油
E．硫酸镁
