什么是像素如何计算

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select * from tbl_Articles WHERE ArticleID=158866 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=158866 LIMIT 0,1
select * from tbl_Articles_sphinx where id=158866 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1104847,1078717,1103853,1099203,1086762,990402,1080677,1102466,1086262,1064553,1106994,1063981,1072921,1067803,1098277,1078134,1117299,1078983,1044735,1088431,1119800,1082303,1063151,1095828,1073387,1051435,1090945,1061744,1092040,1081422) ORDER BY field (ArticleID,1104847,1078717,1103853,1099203,1086762,990402,1080677,1102466,1086262,1064553,1106994,1063981,1072921,1067803,1098277,1078134,1117299,1078983,1044735,1088431,1119800,1082303,1063151,1095828,1073387,1051435,1090945,1061744,1092040,1081422)