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【单选题】
,女,23 岁,甲状腺大部切除术后 6 小时,患者突然出现进行性呼吸困难,烦躁不安,发绀,检查发现颈部肿大,切口有大量渗血。引起的原因最可能是A.
痰液阻塞
B.
气管塌陷
C.
喉头水肿
D.
双侧喉返神经损伤
E.
切口内血肿压迫血管
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举一反三
【单选题】现场救护局部伤口处理正确的是 prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
A.
无菌纱布覆盖
B.
B ．内脏、组织等纳回伤口
C.
C ．清除伤口异物
D.
D ．清除血凝块 prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
E.
外露的骨折端归位 prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
【单选题】Which of the following statements about the marginal rate of substitution is NOT correct?
A.
It measures the number of units of the good on the horizontal axis that a consumer must be compensated with to give up a unit of the good on the vertical axis, while remaining on the same indifference curve.
B.
It is measured by the slope of the indifference curve.
C.
It decreases in value when moving downward along a typical-shaped indifference curve.
D.
It is constant for goods that are perfect substitutes.
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