Koa 中怎样获取请求中的 query 参数

index.js

const Koa = require("koa");
const app = new Koa();

app.use((ctx) => {
  const {
    request: { query: query1, querystring: queryString1 },
    query,
    querystring: queryString,
  } = ctx;

  ctx.body = [query, query1, queryString, queryString1];
});

app.listen(3000);