发生全肺气肿时，从呼吸性细支气管到肺泡的所有腺泡都丢失了。
Panacinar emphysema occurs with loss of all portions of the acinus from the respiratory bronchiole to the alveoli.
在肺部，布满粘液的支气管像树一样又分为成千上万个更小的管(细支气管)，他们连接到叫做肺泡的小囊。
Within the lungs, the mucus-lined bronchi split like the branches of a tree into tens of thousands of ever smaller tubes (bronchioles), which connect to tiny sacs called alveoli.
目的研究肺表面活性蛋白A（SP-A）在肺出血新生儿支气管肺泡灌洗液（BALF）中的变化及其与预后的关系。
Objective To study the change of surfactant protein A(SP-A)in bronchoalveolar lavage fluid(BALF)and the relationship with prognosis in newborns with pulmonary hemorrhage.
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