什么是倍增模式

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select * from tbl_Articles WHERE ArticleID=1838773 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=1838773 LIMIT 0,1
select * from tbl_Articles_sphinx where id=1838773 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(424836,2441306,1095492,2873130,1305476,1116982,1188987,1121546,1167447,1275211,1115317,1082483,1745458,1105207,610882,1097540,1110714,1406323,1118579,1866815,1095277,1390333,2085835,818482,2048149,1117401,610472,380003,1148757,1117753) ORDER BY field (ArticleID,424836,2441306,1095492,2873130,1305476,1116982,1188987,1121546,1167447,1275211,1115317,1082483,1745458,1105207,610882,1097540,1110714,1406323,1118579,1866815,1095277,1390333,2085835,818482,2048149,1117401,610472,380003,1148757,1117753)