微信小程序导航参数中含有问号

 wx.navigateTo({
      url: "../about/about?a=3?3"
 })

{a=3}

var app = getApp()
app.globalData.paramsName = " "

  wx.setStorageSync("paramName", "paramValue")

   wx.getStorage({
      key: 'paramName',
      success: function(res) {
        console.log(res.data)
      },
   })

    let data = escape("4?4")
    wx.navigateTo({
      url: "../about/about?a=" + data
   })

  onLoad: function (options) {

    console.log(options)
    let a = options.a 
    a = unescape(a)
    console.log(a)
  }