北京北麵的山裏有好水，北京及周邊平原地區的的水不行，含鈣高，屬硬水，長年飲用會導致骨質增生。

來源: 信筆由墨於 2023-06-04 07:26:37 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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