At the risk of sounding redundant, or repeating myself unduly, or saying the same thing all the time, let no bass note ring beyond their duration in this piece. At the start, the harmony moves from tonic to dominant every two beats. Both the D major and A Minor has open bass notes, but don't let them ring over each other at all. This is tricky to damp them all, but absolutely necessary for the proper clarity and spirit of the piece.