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https://medlineplus.gov/ency/article/003998.htm#:~:text=After%20age%2030%2C%20people%20tend,osteoporosis%20in%20the%20later%20stages).
您即将离开知乎,请注意您的帐号和财产安全。
https://medlineplus.gov/ency/article/003998.htm#:~:text=After%20age%2030%2C%20people%20tend,osteoporosis%20in%20the%20later%20stages).