【单选题】

The research was done by aDr. Griffiths inEnglanD、He compared the behavior of 15 regular gamblers (赌徒) with those of 15 non-regular gamblers before and after they gambleD、Both groups had increased heart rates during gambling because it was exciting.But the regular gamblers’ heart rates went down almost straight after the game, while the non-regulars remained excited and had in- creased heart rates for longer.

When the heart beat increases, the body produces one chemical called endorphins which make you feel gooD、Dr. Griffiths thinks that regular gamblers lose this good feeling soon after a game and need to play again quickly to regain the pleasure.
He has also discovered that regular gamblers have different psychological reactions (心理反应) from non-regular gamblers. In an experiment where regular and non-regular gamblers spoke their thoughts aloud while playing, regular gamblers had far more unreasonable thoughts. In their minds they turned losses into near wins.Dr. Griffiths thinks that nearly winning gives the gambler a high in the same way that a win would do.
Based onDr. Griffiths’ s research, doctors suggest that one way to help regular gamblers to give up gambling is to give them β-blockers-drugs (β受体阻滞药) that stop them getting a high in the first place.
How didDr. Griffiths discover the gamblers’ feelings when winning and losing
[A]By examining the different chemicals in gamblers’ bodies.
[B]By asking the gamblers to speak aloud their feelings.
[C]By asking the gamblers to discuss their ideas
[D]By testing the gamblers’ heart beat.