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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 ]
正在从腿部受伤或手术中恢复的人，使用的扶杖高度正确与否很重要。太长或太短的扶杖可能造成腰背疼痛、姿势不正和走路不稳。扶杖应拿在患腿对侧。
