在移植级别的手术室中，替换一个支气管（主气管的分支，通入到肺中）听起来与在一个新的心脏中搭桥相比，一点也不困难。

IN THE hierarchy of transplant surgery,replacing a bronchus (the passage from the main windpipe, the trachea, into alung) does not sound difficult compared with, say, plumbing in a new heart.

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如果可能，在进行可能会增加血管栓塞风险或将会长期不活动的手术之前，雌激素疗法应该停止4到6周。

If possible, estrogen therapy should be discontinued at least 4 to 6 weeks before any surgery associated with an increased risk for thromboembolism or during periods of prolonged immobilization.

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