一、设置对照组疾病的转归是由机体内外诸因素互相作用的结果。如果在判断一种药物或治疗措施效果时,只看作是它的作用,忽视患者的体质及心理等因素的影响,未能设置对照研究,是不可能得出符合客观实际的结果。对照研究是科学试验必不可少的条件,例如曾有人推荐用X线照射脑垂体治疗高血压,为了验证这一疗法,将50名高血压患者分为两组,每 First, setting the outcome of the control group is the result of the interaction of various factors inside and outside the body. If one judges the effect of a drug or therapeutic measure, it is only regarded as its effect, neglecting the influence of the patient’s physical and mental factors, and failing to set up a comparative study, it is impossible to arrive at an objective and practical result. Controlled studies are an indispensable condition for scientific experiments. For example, X-rays have been recommended for the treatment of hypertension in the pituitary gland. To test this therapy, 50 hypertensive patients were divided into two groups.