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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 ]
受骨关节炎破坏的膝关节可置换为人工关节。进行全身麻醉后,外科医生在受损的膝关节上做一个切口。去除髌骨,并将股骨、胫骨表面被破坏的软骨清除,使之变得光滑,以便人工假体能更好地与骨面紧贴。人工关节一部分嵌入股骨,另一部分嵌入胫骨,然后将这些部分固定在适当位置。