Look at example for elemMatch: http://docs.mongodb.org/manual/reference/operator/query/elemMatch/#op._S_elemMatch

Try to create such a query:
{ results: { $elemMatch:

} }

It should look something like this:
Query.ElemMatch("results", Query.And(Query.GTE(80), Query.LT(85)))

But it is not possible, since GTE, GT, LTE, LT and all other similar methods require a name. It will either throw null reference, or, if you set any name, query will not return any results.