請問：尼日利亞有多少65歲以上人群？有多少人有基礎病？另外，引用別人的言論，請給出處！

來源: fuz 於 2022-02-21 08:46:03 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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