企业要想提高边际贡献总额，可采取的措施有（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25016' and id < 2130237 and id<>'2130237' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25016' and id > 2130237 and id<>'2130237' order by id asc limit 5