async getData() {       await this.Arr.forEach(async val => {         let obj = {};         let itemBody = {key:val}         let data = await post(this.dataUrl, itemBody, this.header);         console.log(data);        if (data.result) {           obj[val] = data.result.res;           closeAry.push(obj);         }       });      this.closeAry = closeAry;       let setKey = this.getStorageKey()       wx.setStorageSync(setKey.toString(), closeAry)     }Arr 數組對應的是15條接口，本來想同步執行每個ajax,但是太慢。怎樣讓并發請求數據，返回結果在closeAry的順序和Arr順序對應？