能否给出一个使用AsyncLocalStorage的简单示例？

当然可以啦。以下是一个简单的示例，展示了如何在HTTP服务器中使用AsyncLocalStorage来为每个请求分配一个唯一的ID，并在异步操作中使用这个ID进行日志记录：

import http from 'node:http';  
import { AsyncLocalStorage } from 'node:async_hooks';  
const asyncLocalStorage = new AsyncLocalStorage();  
function logWithId(msg) {  
  const traceId = asyncLocalStorage.getStore();  
  console.log(`${traceId}:`, msg);  
}  
let traceId = 0;  
http.createServer((req, res) => {  
  asyncLocalStorage.run(traceId++, () => {  
    logWithId('start');  
    setImmediate(() => {  
      logWithId('finish');  
      res.end();  
    });  
  });  
}).listen(8080);