2. 外语
  3. More than two-thirds of adults in the United States are overweight and half of them are trying to lose weight. According to a re

More than two-thirds of adults in the United States are overweight and half of them are trying to lose weight. According to a re

admin2022-07-24  45
问题     More than two-thirds of adults in the United States are overweight and half of them are trying to lose weight. According to a recent study, led by Evan Forman, a psychology professor from Drexel University, a smartphone app called OnTrack can predict ahead of time when users are likely to lapse (放弃) their weight loss plans and help them stay on track.
    People on weight loss plans often experience lapses, which can prevent successful weight loss or even lead to weight regain, according to Forman. The study evaluated the effectiveness of the app among weight loss program participants, individuals attempting to follow an online weight management plan from Weight Watchers for eight weeks.
    OnTrack uses advanced statistical methods—machine learning—to learn over time a user’s individual patterns of eating. Specifically, it learns patterns that are predictive of staying on one’s weight loss plan and patterns that are predictive of lapsing from one’s plan. When the app detects the risk of lapsing is high, it sends a special coaching message that matches the reasons that someone is at risk. For example, the app can predict a person is eating late at night because of being bored at home with tempting(诱人的) food. The predictions get better over time as the app learns a user’s behavioral pattern.
    According to Forman, over the course of the study, participants averaged a 3. 13 percent weight loss and reduction in unplanned lapses. The next step is clinical trial to confirm the app’s ability as a weight loss tool.
What is OnTrack used to do?
选项 A、To keep track of phones.
B、To plan route for its users.
C、To remind people to keep dieting.
D、To predict possible mental disease.
答案C
解析 根据文章第一段最后一句“…a smartphone app called On Track can predict ahead of time when users are, likely to lapse(放弃)in their weight loss plans and help them stay on track．”可知，一款名为“On Track”的智能手机应用程序可以提前预测什么时候放弃他们的减肥计划并帮助他们保持在正轨上。由此可推测OnTrack这个软件会提醒人们坚持节食(减肥)，故选C。
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