尝试使用reduce将数组内对象的嵌套属性合并为包含所有嵌套属性的单个对象，但仅获得单个值

const arr = [
  { name: 'Alice', age: 25, address: { city: 'New York', country: 'USA' } },
  { name: 'Bob', age: 30, address: { city: 'London', country: 'UK' } },
  { name: 'Charlie', age: 35, address: { city: 'Paris', country: 'France' } }
];

const mergedObject = arr.reduce((acc, obj) => {
  Object.keys(obj).forEach(key => {
    if (typeof obj[key] === 'object' && obj[key] !== null) {
      Object.assign(acc, obj[key]);
    }
  });
  return acc;
}, {});

console.log(mergedObject);

{
  city: 'Paris',
  country: 'France'
}