我收集了一些客户及其访问过的地点，组织如下：

{
  "customer_id": 151,
  "first_name": "Nakia",
  "last_name": "Boyle",
  "visited_places": [
    {
      "country": "Liberia",
      "cities": [
        "Mullerside",
        "East Graham"
      ]
    },
    {
      "country": "Rwanda",
      "cities": [
        "West Kristofer",
        "Effertzbury",
        "Stokeston",
        "South Darionfort",
        "Lewisport"
      ]
    }
  ]
}

我试图找到访问过特定国家/地区特定城市的所有客户。我的工作方式如下：

FOR target IN usertable 
FILTER [] != target.visited_places[* FILTER CURRENT.country == @country AND CONTAINS(CURRENT.cities, @city)]
LIMIT @limit 
RETURN target

查询看起来很麻烦，我不确定它是否有性能。
在可读性和性能方面，有没有更好的方法来做到这一点？