什么叫尺度空间

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select * from tbl_Articles WHERE ArticleID=2106707 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=2106707 LIMIT 0,1
select * from tbl_Articles_sphinx where id=2106707 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(3450481,1809205,1070119,3488562,361813,2564636,1090356,85996,101134,364719,2027241,1106623,1118142,1082320,100472,1851717,373309,370947,1104171,1099323,719890,1102951,86787,365916,371501,362872,1119852,1290456,3456209,1095638) ORDER BY field (ArticleID,3450481,1809205,1070119,3488562,361813,2564636,1090356,85996,101134,364719,2027241,1106623,1118142,1082320,100472,1851717,373309,370947,1104171,1099323,719890,1102951,86787,365916,371501,362872,1119852,1290456,3456209,1095638)