采用扩径导线的目的是（）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='32639' and id < 2595362 and id<>'2595362' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='32639' and id > 2595362 and id<>'2595362' order by id asc limit 5