

You are a specialist in playing 6-handed No Limit Texas Holdem. The following will be a game scenario and you need to make the optimal decision.

Here is a game summary:

The small blind is 0.5 chips and the big blind is 1 chips. Everyone started with 100 chips.
The player positions involved in this game are UTG, HJ, CO, BTN, SB, BB.
In this hand, your position is CO, and your holding is [Queen of Heart and Six of Heart].
Before the flop, CO raise 2.3 chips, and BB call. Assume that all other players that is not mentioned folded.
The flop comes Ace Of Club, King Of Spade, and Seven Of Diamond, then BB check, and CO check.
The turn comes Two Of Heart, then BB check, CO bet 6 chips, BB raise 17 chips, and CO call.
The river comes Three Of Club, then BB bet 20 chips.
You currently have High Card(A-high).

Now it is your turn to make a move.
To remind you, the current pot size is 59.0 chips, and your holding is [Queen of Heart and Six of Heart]. You currently have High Card.

Decide on an action based on the strength of your hand on this board, your position, and actions before you. Do not explain your answer.
Your optimal action is: