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邹先生今年62岁,是某单位的退休干部。他平时没啥爱好,就喜欢看看书,整天呆在家里看书,有时一坐就是一整天。除了早晨步行半小时左右,平时很少出去活动。半年前他感到膝关节疼痛、僵硬、两腿无力
Mr. Zou, 62, is a retired cadre of a unit. He usually nothing like hobby, like reading, reading at home all day, sometimes sitting is a whole day. In addition to walking in the morning about half an hour, usually rarely go out activities. He felt knee pain and stiffness six months ago with weak legs