我有一个集合，里面的文档是这样的{"_id":"api","titleAndTimeDetails":[{"Title":"apidata","timeTaken":NumberLong(8091446063)},{"Title":"classdata","timeTaken":NumberLong(519163710)},{"Title":"APIordatasetsforageworld","timeTaken":NumberLong(34245103)},{"Title":"WhatdoesanullresultmeanAPI?","timeTaken":NumberLong(1