怎样优先使用国内流量

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select * from tbl_Articles WHERE ArticleID=1472437 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=1472437 LIMIT 0,1
select * from tbl_Articles_sphinx where id=1472437 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1512422,2895770,1128033,845305,3081394,3010637,432703,3219644,1133085,2052679,185892,1796717,3209612,1297074,2085849,2620086,1376193,2934659,2402106,3014328,1891182,1047309,322711,370215,799675,3283856,1347043,2963883,1127521,127771) ORDER BY field (ArticleID,1512422,2895770,1128033,845305,3081394,3010637,432703,3219644,1133085,2052679,185892,1796717,3209612,1297074,2085849,2620086,1376193,2934659,2402106,3014328,1891182,1047309,322711,370215,799675,3283856,1347043,2963883,1127521,127771)