function checkNestedObject(obj, targetValue) {
  for (let key in obj) {
    if (typeof obj[key] === 'object') {
      if (checkNestedObject(obj[key], targetValue)) {
        return true;
      }
    } else if (obj[key] === targetValue) {
      return true;
    }
  }
  return false;
}

// 示例用法
const data = {
  name: 'John',
  age: 30,
  address: {
    city: 'New York',
    country: 'USA',
    coordinates: {
      latitude: 40.7128,
      longitude: -74.0060
    }
  }
};

console.log(checkNestedObject(data, 'USA')); // 输出 true
console.log(checkNestedObject(data, 'China')); // 输出 false