我国是高血压大国,高血压防治任务十分艰巨。据最新数据估算,目前我国年龄≥15岁人群的高血压患病率为24%,全国高血压患者人数2.7亿~([1])。2013年Lancet杂志发表的中国1990-2010年疾病状况分析指出,高血压、大气颗粒物污染和固态燃料所致室内空气污染已经分别高居中国人群死亡诱因的第2、4、5位~([2])。空气污染尤其是大气细颗粒物(fine particulate matter,PM_(2.5))对血压的影响已经成为国内外研究的 China is a big country with high blood pressure, and its task of prevention and treatment of hypertension is arduous. According to the latest data, the current prevalence rate of hypertension in our country is 15% and 24%, and the number of hypertension in our country is 270 million ~ ([1]). According to the analysis of disease status in China from 1990 to 2010 published by Lancet in 2013, high blood pressure, atmospheric particulate matter and indoor air pollution caused by solid fuels have respectively ranked the 2nd, 4th, and 5th places in the Chinese population ~ ([2] ). The impact of air pollution, especially fine particulate matter (PM_ (2.5)), on blood pressure has become a