从多列有序数据中找出总排名靠前的数据,适用于学生成绩管理中，每科成绩按顺序排好，找出总成绩最高的学生，使用了堆排算法，速度更快。-Ordered the data from multiple columns to find out the overall top-ranking data for student performance management, performance for each subject according to the order of line up to identify students with the highest total score, using heap-ordering scheme, faster.