How to do a query like [a between (...) or b between (..) ] in dynamodb

Question

I have some records like

{ PKey, ..., startTime, endTime }

I need to query all data with starttime or endtime within a date range.

With SQL i can do this select * from table where startTime between (a, b) or endTime between (a, b).

So how to do this in dynamodb?