作用域 + this指向 的一道没面试题

输出？

let aname = 'zzh'
let obj = {
    aname: 'lyy',
    say() {
        console.log(this.aname)
        return function () {
            console.log(this.aname)
            console.log(aname)
        }
    }
}
obj.say()()