“大学之教也，时教必有正业，退息必有居学。”这句话出自（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30873' and id < 2485221 and id<>'2485221' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30873' and id > 2485221 and id<>'2485221' order by id asc limit 5