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【单选题】
27岁初产妇，妊娠39，规律宫缩6小时，枕左前位，估计胎儿体重2700g，胎心142次／分。阴道检查：开大3cm，未破膜，S+1，骨盆外测量未见异常。此时恰当处理A.
抑制宫缩，使其维持至妊娠40
B.
等待自然分娩
C.
人工破膜加速产程进展
D.
静脉滴注缩
E.
温肥皂水灌肠
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举一反三
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A.
or rather
B.
other than
C.
rather than
D.
more than
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A.
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B.
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C.
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A.
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B.
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D.
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A.
rather than doing
B.
to doing
C.
rather than to do
D.
to do
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