慢性阻塞性肺疾病(chronic obstructivepulmonary disease,COPD)是呼吸系统的常见病,它以不完全可逆的气流受限为特点,是一种可预防、可治疗的疾病。随着人口老龄化,大气质量的恶化及吸烟人数增多,其发病率逐年增加。早在20世纪80年代就有学者开始关注COPD与营养的关系,并发现C Chronic obstructive pulmonary disease (COPD), a common form of the respiratory system, is characterized by an incompletely reversible airflow limitation and is a preventable and treatable condition. As the population ages, the deterioration of the air quality and the increase in the number of smokers, the incidence increases year by year. As early as the 1980s, scholars began to pay attention to the relationship between COPD and nutrition, and found that C