could i write like this?

```
function (doc,meta) {

emit([[doc.range1, doc.range2],[doc.range3, doc.range4]], doc.comment); 

}

```

i just want to find data use two range.I found a example that is 

```
emit([10.9, 48.4, [1000, 2000]], null);

```

the range [1000,2000] does it can filter data?