function?A(){
????this.x?=?"我想要取到這個(gè)x";
}
A.prototype.b?=?(function()?{
????c?=?function?()?{
????????alert(this.x);?//?這里的this.x如何指向?qū)嵗械膞了？
????}
????
????return?{
????????c?:?c,
????}
})();
var?obj?=?new?A();
obj.b.c();
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