如何使用javascript访问从函数返回的对象的属性？

function createPerson() {
  var person = {
    name: 'John',
    age: 25,
    occupation: 'Engineer'
  };
  
  return person;
}

var personObj = createPerson();

console.log(personObj.name);  // 输出: John
console.log(personObj['age']);  // 输出: 25
console.log(personObj.occupation);  // 输出: Engineer

var property = 'name';
console.log(personObj[property]);  // 输出: John

var specialProperty = 'o c c u p a t i o n';
console.log(personObj[specialProperty]);  // 输出: Engineer