mongodb mapreduce如何分页？

Question

{mapreduce:"topic",
    query:{'time':{'$gte':1443715200}},
    map:function(){emit({name:this.name},this.clickNum);},
    reduce:function(clickNum,numbers){return Array.sum(numbers);},
    out:{inline:1}});

用上面的代码查询后一共有300条数据，这个时候如何对集合进行分页，比如一页20条

Answer 1

out可以输出到某个集合，然后对该集合查询，分页