2019年6月大学英语四级考试真题及答案解析完整版（卷一）（29）

Passage Two

Questions 51 to 55 are based on the following passage

Online programs to fight depression are already commercially available. While they sound efficient cost-saving, a recent study reports that they are not effective, primarily because depressed patients are not likely to engage with them or stick with them.

The study looked at computer-assisted cognitive behavioral therapy for depression, helping people challenge negative thoughts and change the way they think in order to change their mood and behaviors. However, online CBT programs have been gaining popularity, with the attraction of providing low-cost help wherever someone has access to a computer.

A team of researchers from the University of York conducted a randomized (随机的) control trialwith691 depressed patients from 83 physician practices across the England. The patients were split into three groups: one group received only usual care from a physician while the other two groups received usual care from a physician plus one of two computerized CBT programs. Participants were balanced across the three groups for age, sex, educational background, severity and duration of depression, and use of antidepressants(抗抑郁药).