我今年52岁,平时喜欢组织街道里的中老年人跳舞。最近我感到双侧膝关节轻微酸痛,且日渐明显。朋友说这是缺钙的症状,于是我每天喝牛奶,还服用各种钙制剂,可症状不但未改善,反而上楼越来越吃力。到医院检查得知自己不是缺钙,而是有明显的骨质增生。这是怎么回事?河南陆女士 I am 52 years old and usually like to dance the middle-aged and elderly people in the streets. I recently felt a slight soreness in my bilateral knees and became noticeable. Friends say it is calcium deficiency symptoms, so I drink milk every day, but also take a variety of calcium preparations, symptoms not only failed to improve, but getting upstairs more difficult. To the hospital to check that they are not calcium deficiency, but there is obvious osteoarthritis. What is going on? Miss Lu, Henan