query的输出能否把_index、_type、_id、_score这几个字段去掉？

query语句：

GET /bj-sip_register/_search

{

  "query": {

    "range": {

      "@timestamp": {

        "gte": "now-4h",

        "lte": "now"

      }

    }

  },

  "_source": ["ouyu-number","@timestamp"]

}

输出结果的_source部分只显示ouyu-number和@timestamp：

{

  "took" : 108,

  "timed_out" : false,

  "_shards" : {

    "total" : 1,

    "successful" : 1,

    "skipped" : 0,

    "failed" : 0

  },

  "hits" : {

    "total" : {

      "value" : 10000,

      "relation" : "gte"

    },

    "max_score" : 1.0,

    "hits" : [

      {

        "_index" : "bj-sip_register",

        "_type" : "_doc",

        "_id" : "Vjv6CWwBZw_p4NeuCBYm",

        "_score" : 1.0,

        "_source" : {

          "@timestamp" : "2019-07-19T11:24:36.673Z",

          "ouyu-number" : "444192"

        }

      },

      {

      ......

以上结果中_index、_type、_id、_score这几个字段不是我关心的，也不是想放在结果中的，能不能在查询结果中去掉不显示？