目的探讨窗技术对慢性阻塞性肺气肿和无症状长期吸烟者肺残气量的评价。
Objective to study the window technique in evaluating the chronic obstructive emphysema and pulmonary residual volume in long-term smoker without symptoms.
结论长期吸烟者血管内皮功能受损，硝酸甘油诱发的扩血管反应也有所下降。
Conclusions These findings suggest that vascular endothelial function was impaired and vasodialation induced by nitroglycerin was reduced in long-term smoker.
最终当长期吸烟者戒烟时，他们很快发现不吸烟并不意味着他们是非吸烟者。
When longtime smokers finally do quit, they soon realize that not smoking doesn't necessarily make them nonsmokers.
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