The Canadian researchers randomly assigned about half of the addicts to receive methadone and the other half to receive daily injections of diacetylmorphine, the active ingredient in heroin.
加拿大研究者对【将】受验者随机分组,一半接受美沙酮
治疗,另一半每天接受注射
酰吗啡,
成分是海洛因【为海洛因
成分】。