Mongoose发现参考对象

I have a find inside a loop:

我在循环中找到了一个:

for(var idx in items){
    var item = items[idx];

    Model.find({'_id': item.id}, function(err, matches){
          console.log(item); // Points to the last item in items instead of
                             // expected item, since find is asynchronous
    });
}
f