May I suggest that sixty years ago to finish up flying an aeroplane that would stall if you lost two knots and would go out of control due to Mach number if you gained two, was a trickier business than with a more modern design today?
Aircraft behaviour with high mach loss of control has become much less severe in later years.
To go back to the original question the answer has to be to lower the nose a fraction and then once the knots go up by one ease the power back. Just flying really.