异步/等待Asp.Net Core何时需要异步？

Question

在这种情况下，将IO绑定代码放在IO线程上吗？还是我需要使Get方法async和await PassThroughTask？

//Some controller class 

[HttpGet]
public Task<ActionResult> Get()
{
    PassThroughTask(); 
    return Ok("passthrough");
}

public async Task PassThroughTask()
{
    //Is this going to stop the IoBoundWork from going to the IO thread? 
    await SomeIoBoundWorkAsync();
}

public async Task SomeIoBoundWorkAsync(){ //await async io stuff}