我想通過 superagent 插件/庫將 AJAX 請求發送到存儲在 backend/hi.php 中的 php 文件這是 php 文件：<?phpecho "hi";我基本上想從 php 文件中取回 hi。這是請求發生的 reducers/index.js 中的 reducerimport superagent from 'superagent';import jsonp from 'superagent-jsonp';let initialState = null;function reducer(state = initialState,action) {    if(action.type=="SEARCH") {        let url= "/backend/hi.php";        superagent.get(url).end(function(err, res){            console.log(res);        });    }    else {        return state;    }}export default reducer;我在控制臺中得到的不是字符串“hi”，而是以下內容：    Response1.  accepted: false2.  badRequest: false3.  body: null4.  charset: "UTF-8"5.  clientError: false6.  created: false7.  error: false8.  forbidden: false9.  header: {accept-ranges: "bytes", connection: "keep-alive", content-encoding: "gzip", content-type: "text/html; charset=UTF-8", date: "Tue, 21 Jul 2020 15:39:42 GMT", …}10. headers: {accept-ranges: "bytes", connection: "keep-alive", content-encoding: "gzip", content-type: "text/html; charset=UTF-8", date: "Tue, 21 Jul 2020 15:39:42 GMT", …}11. info: false12. links: {}13. noContent: false14. notAcceptable: false15. notFound: false16. ok: true17. redirect: false18. req: Request {_query: Array(0), method: "GET", url: "/backend/hi.php", header: {…}, _header: {…}, …}19. serverError: false20. status: 20021. statusCode: 20022. statusText: "OK"23. statusType: 225. type: "text/html"26. unauthorized: false27. unprocessableEntity: false28. xhr: XMLHttpRequest {readyState: 4, timeout: 0, withCredentials: false, upload: XMLHttpRequestUpload, onreadystatechange: ?, …}29. __proto__: Object這是我的文件夾結構：如何將 Ajax 請求正確發送到 hi.php？