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

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二乙酰吗啡,主要成分是海洛
【为海洛
主要成分】。
,吗啡;
;
品;




