Elasticsearch中聚合之后想返回一个相关度的分，应该怎么处理呀？

curl -X POST "localhost:9200/sales/_search?pretty" -H 'Content-Type: application/json' -d'
{
  "query": {
    "match": {
      "body": "elections"
    }
  },
  "aggs": {
    "top_sites": {
      "terms": {
        "field": "domain",
        "order": {
          "top_hit": "desc"
        }
      },
      "aggs": {
        "top_tags_hits": {
          "top_hits": {}
        },
        "top_hit" : {
          "max": {
            "script": {
              "source": "_score"
            }
          }
        }
      }
    }
  }
}

'可以参考官方例子：https://www.elastic.co/guide/en/elasticsearch/reference/7.17/search-aggregations-metrics-top-hits-aggregation.html 答案整理自钉钉群“Elasticsearch中文技术社区”。