At the same time, medical and social science research began to indicate that retirement itself had detrimental effects.
 
【正确答案】 A
【答案解析】 形容词词义辨析。detrimental意为“有害的”。选项中只有damaging(有破坏性的,损害的)与之意思将近。故答案为A。magnificent“华丽的,宏伟的,高尚的”;useful“有用的”;relevant“有关的,相应的”。