如何限制typescript的文字表达式只接受可用的属性？

interface User {
  name: string;
  age: number;
}

function printUserInfo(user: User) {
  console.log(`Name: ${user.name}, Age: ${user.age}`);
}

const user = { name: "Alice", age: 30 };
printUserInfo(user); // 正确使用

interface User {
  name: string;
  age: number;
}

function getUser(): any {
  return { name: "Alice", age: 30, email: "alice@example.com" };
}

const user = getUser() as User;
console.log(user.name); // 正确使用

interface User {
  name: string;
  age: number;
}

function isUser(obj: any): obj is User {
  return typeof obj.name === "string" && typeof obj.age === "number";
}

function printUserInfo(obj: any) {
  if (isUser(obj)) {
    console.log(`Name: ${obj.name}, Age: ${obj.age}`);
  } else {
    console.log("Invalid user object");
  }
}

const user = { name: "Alice", age: 30, email: "alice@example.com" };
printUserInfo(user); // 正确使用