在对多个方案进行比选时，通常釆用（ ）作为净现值的辅助指标。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='27079' and id < 2244503 and id<>'2244503' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='27079' and id > 2244503 and id<>'2244503' order by id asc limit 5