[单项选择]Aimee Hunter, a research psychologist at the University of California, Los Angeles, has long studied individual responses to antidepressants. Being skeptical of the true effectiveness of the drugs, she says she was originally interested in researching the impact of placebos. But over the years, her own data began convincing her otherwise. "I’ve come to see now, by doing the research myself and spending hours looking at numbers, that the medication is absolutely doing something," Hunter says.
In an earlier study that Hunter published in 2009, she and her team used the same QEEG technique on 58 patients, who were given a placebo daily for one week before being randomized to take either placebo or an active drug. Researchers found distinct patterns of brain activity in the patients; not everyone responded to the placebo the same way. "We found that changes in brain function occurring during the first week of placebo predicted who will do well on medication," she says.
The region
A. is what a placebo can do for patients.
B. cannot help depressed patients at all.
C. works better with some patients than with others.
D. is the only thing an antidepressant can do.

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