题目选项分析

Some patients who do not respond to therapies for depression may simply have received inadequate treatment, having, for example, been prescribed a drug at a dosage too low to be effective or having been taken off a drug too soon.

Some patients who do not respond to therapies for depression may simply have received inadequate treatment, having, for example, a drug prescription that was ineffective because the dosage was too low, or being taken off a drug too soon.