为什么Axios在useEffect中调用只返回一次数据？

import React, { useState, useEffect } from 'react';
import axios from 'axios';

const MyComponent = () => {
  const [data, setData] = useState([]);

  useEffect(() => {
    const fetchData = async () => {
      const response = await axios.get('https://api.example.com/data');
      setData(response.data);
    };

    fetchData();
  }, []); // 空数组表示只在组件的初始渲染时执行一次

  return (
    <div>
      {/* 使用返回的数据进行渲染 */}
      {data.map(item => (
        <div key={item.id}>{item.name}</div>
      ))}
    </div>
  );
};

export default MyComponent;

useEffect(() => {
  // 发送请求并更新数据
}, [dependency1, dependency2]);