如何从两个相似的函数中创建一个泛型函数？

function addNumbers(a: number, b: number): number {
  return a + b;
}

function concatenateStrings(a: string, b: string): string {
  return a + b;
}

function combine<T>(a: T, b: T): T {
  return a + b;
}

const numbers: number[] = [1, 2, 3];
const strings: string[] = ["Hello", "World"];

const combinedNumbers: number[] = combine(numbers, [4, 5, 6]);
const combinedStrings: string[] = combine(strings, ["Foo", "Bar"]);

console.log(combinedNumbers); // [1, 2, 3, 4, 5, 6]
console.log(combinedStrings); // ["Hello", "World", "Foo", "Bar"]