2021全国卷新高考英语阅读与写作专题拓展提升（4）

2021全国卷新高考英语阅读与写作专题拓展提升（4） 空气污染可能增加骨折风险 导读 研究人员报告称，空气污染会增加骨质疏松和骨折的风险。   双语阅读 Investigators analyzed data from two studies. The first tracked hospital admissions among 9.2 million Medicare recipients in the Northeast over eight years. The second looked at levels of parathyroid hormone, which aids bone health, in 692 middle-aged low-income men in Boston. 研究人员分析了两项研究的数据。第一项研究追踪了美国东北部的920万联邦医疗保险受益者在过去八年里的住院情况。第二项研究调查了波士顿的692名中年低收入男性的甲状旁腺激素水平，该激素有助于骨骼健康。 The study, in Lancet Planetary Health, found that the risk for bone fracturesamong people over 65 increased steadily as levels of air pollution — specifically, particulate matter smaller than 2.5 micrometers, or PM 2.5 — went up. Rates were almost 5 percent higher in areas with the highest concentrations of PM 2.5 than in those with the lowest. 发表在《柳叶刀·星球健康》杂志上的该研究发现，65岁以上人群骨折的风险随着空气污染水平的上升而稳步增加——尤其是小于2.5微米的颗粒物的增加，也就是PM2.5浓度的上升。在PM2.5浓度最高的地区，骨折的发病率比浓度最低的地区高出近5%。 The study in middle-aged men found that people living in locations with higher