写作业慢怎么办

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select * from tbl_Articles_data WHERE ArticleID=947511 LIMIT 0,1
select * from tbl_Articles_sphinx where id=947511 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(615673,678040,814349,1604785,630549,682673,796659,444930,855713,598907,542572,450308,755409,543960,624360,542814,471433,776149,481422,479843,497320,821145,753941,549770,724888,841190,779307,486283,674227,520433) ORDER BY field (ArticleID,615673,678040,814349,1604785,630549,682673,796659,444930,855713,598907,542572,450308,755409,543960,624360,542814,471433,776149,481422,479843,497320,821145,753941,549770,724888,841190,779307,486283,674227,520433)