对于消费不足和投资不足，凯恩斯运用（ ）来加以解释。[2015年5月二级真题]

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25261' and id < 2138441 and id<>'2138441' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25261' and id > 2138441 and id<>'2138441' order by id asc limit 5