这是我的MongoDB集合中的示例文档:varuser:[{"_id":ObjectId("5391b11a3c0a9ac01300006d"),"injurydata":{"injuryinformation":[{"status":"current","updateddate":ISODate("2014-06-06T12:16:20.306Z"),"updatedby":"","dateofinjury":ISODate("2014-06-27T18:30:00.000Z"),"_id":ObjectId("5391b11a3c0a9ac01300006f")}]}},{"_id