我前麵已經貼過這個數據，這網站還有一個解釋，主要是家庭兜底。Cornell, Penn, 大貓的家庭兜底的少

來源: mjnew 於 2024-12-03 19:17:37 [舊帖] [給我悄悄話] 本文已被閱讀：次

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