[单选题]What's the purpose of the text?
A.To call on us to protect the environment.
B.To analyze various reasons for Alzheimer.
C.To present findings of a new research.
D.To draw our attention to the elders' health.

参考答案:C

目的意图题。根据第一段第一句"A new research added brain degradation such as Alzheimer(阿尔兹海默症）to the growing list of effects of fine particles(微粒）．"（一项新的研究将阿尔茨海默氏症等大脑退化列入了不断增加的细颗粒影响名单。）和第二句"A study of 63 million adults older than 65 in the United States showed that from 2000 to 2016, first-time hospital admissions for Alzheimer's disease, and related diseases rose by 13 percent with every 5-microgram (per cubic meter of air) increase in annual concentrations of PM 2. 5."（一项针对美国6300万65岁以上成年人的研究显示，从2000年到2016年，pm2.5的年浓度每增加5微克(每立方米空气)，首次因阿尔茨海默氏症和相关疾病住院的人数就增加了13%。），第三段第一句"Antonella Zanobetti, a co-author of the study, said the new research results show that current U. S. regulations are inadequate to protect the aging American population"（这项研究的合著者Antonella Zanobetti说，新的研究结果表明，目前的美国法规不足以保护老龄化的美国人口）和第四段第一句"Women, white people, and urban populations, particularly in the Northeast, were particularly at risk, the research showed."（研究显示，女性、白人和城市人口，尤其是东北部地区的人口，面临的风险尤其大。）可知，文章主要是为了展示新的研究的发现。故选C。