慢性支管炎气阻塞性肺气肿支管气扩张症慢性支管炎气阻塞性肺气肿xxx呼吸科内xxxCOPD是世界第4位的主要死亡原因包括：慢性阻塞性支管炎气阻塞性肺气肿COPDisadiseasestatecharacterizedbyairflowlimitationthatisnotfullyreversible.Theairflowlimitationisusuallybothprogressiveandassociatedwithanabnormalinflammatoryresponseofthelungstonoxiousparti...
