如何从node express mongoose mongoDb中的地理位置数据中获取城市名称

const mongoose = require('mongoose');

const locationSchema = new mongoose.Schema({
  city: String,
  coordinates: {
    type: {
      type: String,
      enum: ['Point'],
      required: true
    },
    coordinates: {
      type: [Number],
      required: true
    }
  }
});

locationSchema.index({ coordinates: '2dsphere' });

const Location = mongoose.model('Location', locationSchema);

module.exports = Location;

const Location = require('./models/location');

const newLocation = new Location({
  city: '北京',
  coordinates: {
    type: 'Point',
    coordinates: [116.407394, 39.904211] // 北京的经纬度坐标
  }
});

newLocation.save((err, savedLocation) => {
  if (err) {
    console.error(err);
  } else {
    console.log('地理位置数据保存成功！');
  }
});

const Location = require('./models/location');

const longitude = 116.407394; // 经度
const latitude = 39.904211; // 纬度
const maxDistance = 10000; // 最大距离（单位：米）

Location.find({
  coordinates: {
    $near: {
      $geometry: {
        type: 'Point',
        coordinates: [longitude, latitude]
      },
      $maxDistance: maxDistance
    }
  }
}, (err, locations) => {
  if (err) {
    console.error(err);
  } else {
    const cities = locations.map(location => location.city);
    console.log('找到的城市名称：', cities);
  }
});