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• Use “ “ for phrases o [ “pediatric abdominal pain” ] • Use – to remove results with certain terms o [ “abdominal pain” –pediatric ] • Use OR to account for alternate terms o [teenager OR adolescent ]
宝宝一出生,医生就用两个止血钳夹住脐带,并从中间剪断。当脐带完全干燥时,可取下脐带残端上的止血钳。残端必须保持清洁、干燥。残端会在一周或两周内自动脱落。