客户购房时通常对面积和价格等有明确意愿，这体现了客源具有（）特征。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='28968' and id < 2366390 and id<>'2366390' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='28968' and id > 2366390 and id<>'2366390' order by id asc limit 5