单选题 A corps of so-called barefoot doctors are trained in hygiene, preventive medicine, acupuncture, and routine treatment of common diseases.
A. nutrition B. sanitation C. nursery D. welfare

【正确答案】 B
【答案解析】[解析] 本题中，hygiene的意思是“卫生学”。B项的“sanitation卫生学”符合题意。其他三项“nutrition营养学；nursery拖儿所；welfare社会福利”都不正确。