单选题 .  You may know the feeling. It's the late afternoon, and you still haven't left the house. You've spent the last several hours on your phone, scrolling through your Facebook news feed, refreshing Twitter and watching YouTube videos. A smartphone might feel like it's keeping you connected, but it can also be a way of secluding yourself.
    Data from a recent study conducted by researchers at Northwestern University's Feinberg School of Medicine found that the scenario described above—high volume of phone use and a static (静止的) geographic location—could be linked to depression. The study, published in The Journal of Medical Internet Research, also found that depressed people, on average, spend more time on the phone than non-depressed people.
    "People are likely, when on their phones, to avoid thinking about things that are troubling, painful feelings or difficult relationships," said David Molar, one of the study's senior authors and a professor of behavioral psychology at Northwestern, in a statement. "It's an avoidance behavior we see in depression." Mohr also pointed out that depressed people tend to withdraw emotionally and avoid going out—behaviors that are arguably facilitated by the constant entertainment stream available on smartphones.
    The study's participants consisted of a mix of people with and without prior depression. They completed a questionnaire describing their symptoms before agreeing to have their phone use monitored for two weeks. Using GPS, the researchers tracked their location and the amount of time they spent on the phone. They were then able to identify which participants were depressed using the aggregated phone data, with 87 percent accuracy.
    Sohrob Saeb, a research fellow at Northwestern, said in the release that phones could be more reliable for diagnosing depression than traditional methods. In standard industry practice, patients are often asked to describe their symptoms by indicating how sad they are on a scale of 1 to 10. According to Saeb, the release reported, these responses can be rote and unreliable. In contrast, the study found, a smartphone can unobtrusively (不引人注目地) and accurately measure a patient's daily activity, providing data that could trigger a health care provider to recognize the need for an intervention.
1.  What is the author's opinion about using a smartphone? ______
【正确答案】 D
【答案解析】 由题干中的opinion和smartphone定位到原文第一段最后一句。
   细节辨认题。由定位句可知，作者认为智能手机虽然可能让人感觉时刻和外界保持着联系，但是其实是一种隔离自己的方式，故答案为D。
[参考译文] 你也许知道这种感受：在傍晚时分，你仍然没有离开家。你已经玩儿了好几个小时的手机，翻看着你在Facebook上的动态消息，刷新你的Twitter，或是看YouTube上的视频。一部智能手机可能让你觉得好像时时都在与外界联系，但是这其实也是一种隔离自己的方式。
   西北大学费恩伯格医学院的研究人员的最近一项研究的数据发现上述的情况——手机的高使用率和静止不动——或许和抑郁有关。这项发表在《医学互联网研究期刊》上的研究同时也发现，平均来看，抑郁人群会比非抑郁人群花费更多的时间在手机上。
   这项研究的高级作者之一、西北大学行为心理学教授大卫·莫尔在一份声明中说：“人们在使用手机的时候更容易避免去想那些烦恼的事情、痛苦的感受或是难相处的人际关系。这是我们在抑郁中常见的一种回避行为。”他同时指出抑郁人群更易于收敛自己的情绪或是避免外出——可以说智能手机上不间断的大量娱乐活动助长了这些行为。
   这项研究的参与者是由一群之前患过抑郁症或是没有患过此病的人结合组成的。在同意自己手机使用情况被监控两周的时间之前，他们完成了一项调查问卷，描述了自己的症状。通过使用全球定位系统，研究人员追踪了他们的位置以及他们使用手机的时间。研究人员随之就可以通过手机上收集到的数据断定哪些参与者是抑郁的，准确率达到87%。
   西北大学的一位研究者索拉博·赛义卜在发布会上说，在诊断抑郁症方面，手机比其他一些传统方法可能更可靠。在标准化的行业惯例中，病人经常被要求从1到10来表明自己的痛苦程度，以此来描述自己的症状。在发布会上，依据赛义卜所言，这些反馈都是生硬且不可信的。相比之下，该研究发现智能手机却可以不动声色而准确地监测病人的日常行为，提供可以让医疗人员意识到有介入的必要性的数据。