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  52
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 Paragraph 3 mainly about?
选项 A、The basic principles of OnTrack.
B、The main patterns of healthy eating.
C、The importance of weight loss plans.
D、The development of machine learning.
答案A
解析 根据文章第三段第二、第三句“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 someone is at risk．”可知，可知OnTrack这个软件能够检测到一个人减肥计划的模式和想要放弃的特征，与此同时会发送风险短信进行督促，结合前文提到它的计算方法和下文举的例子可知，第三段主要在描述OnTrack这款软件的一些基本规则，故选A。
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