The pharmaceutical company insisted that its testing of new drugs was quite______, more rigorous than the industry standard.
【正确答案】 A
【答案解析】解析:stringent“严格的”;recessive“逆行的,(遗传特征)隐形的”:obtrusive“扎眼的,显眼的”;traumatic“外伤的,损伤的,创伤的”。根据常识,制药过程应该是严格的,故选A。