骨质疏松症是一种骨骼变弱的疾病，使它们变得脆弱，更容易断裂。 It develops gradually and is often called a "silent disease" because many people don’t realize they have it until they suffer a fracture—commonly in the hip, spine, or wrist. 定期的骨密度检查可以帮助及早发现病情，降低骨折风险。
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