您可以使用条款聚合与 min_doc_count：2 像这样

You'd do this with a terms aggregation with min_doc_count: 2 like this

{
  "size": 0,
  "aggs": {
    "countries": {
      "terms": {
        "field": "countryName"
      },
      "aggs": {
        "ids": {
          "terms": {
            "field": "countryId",
            "min_doc_count": 2
          }
        }
      }
    }
  }
}

请注意， countryName 字段应为 not_analyzed ，以使其正常工作，或 countryName 字段是多字段，一个 not_analyzed 部分。

Note that the countryName field should be not_analyzed in order for this to work, or the countryName field is a multi-field with a not_analyzed part.