MongoDB-如何根据键名查询文档？

Question

我的收藏集具有与此相似的文档：

{
"_id" : "123456789",
"createdDateTime" : ISODate("2018-10-10T14:48:38.314Z"),
"fields" : {
    "session" : null,
    "information" : [ 
        {
            "userID" : {
                "changedDate" : NumberLong(1539129767860),
                "before" : "12",
                "after" : "13",
                "jaro" : 0.66
            },
            "distance" : 2838,
            "Account" : "55555",
            "accountDate" : {
                "changedDate" : NumberLong(1539129767860),
                "before" : NumberLong(1293858420000),
                "after" : NumberLong(1293858420000),
                "jaro" : 1.0
            }
        }, 
        {
            "distance" : 2838,
            "Address" : {
                "changedDate" : NumberLong(1539134488307),
                "before" : "NY",
                "after" : "NJ",
                "jaro" : 0.0
            },
            "Account" : "66666",
            "accountDate" : {
                "changedDate" : NumberLong(1539134488307),
                "before" : NumberLong(1293858420000),
                "after" : NumberLong(1293858420000),
                "jaro" : 1.0
            }
        }
    ]
}
}

如您所见，信息键具有一组嵌套对象。第一个对象具有 UserID 键，第二个对象具有 Address 键；除此之外，两个对象都有距离，一个account和accountDate键。

我想查询存在地址更改的元素，但只想提取包含 Address 键的元素，在这种情况下，我想要这样：

{
"_id" : "123456789",
"createdDateTime" : ISODate("2018-10-10T14:48:38.314Z"),
"fields" : {
    "session" : null,
    "information" : [ 
        {
            "distance" : 2838,
            "Address" : {
                "changedDate" : NumberLong(1539134488307),
                "before" : "LYNN",
                "after" : "GEORGETOWN",
                "jaro" : 0.0
            },
            "Account" : "66666",
            "accountDate" : {
                "changedDate" : NumberLong(1539134488307),
                "before" : NumberLong(1293858420000),
                "after" : NumberLong(1293858420000),
                "jaro" : 1.0
            }
        }
    ]
}
}

我该如何查询？

我的mongodb是3.2

谢谢！