The "LOWER THE NOSE" is firmly emphasised, and the interesting point for me was that your stall margin decreased due to Mach effect as you accelerate. The point made was one must accept trading 2-3000' of altitude for speed in the recovery.
The B737 FCTM states that for holding above 25,000 ft with inop FMC, fly at Vref40 plus 100 knots. In the 737-300 that means around 230 knots plus or minus a bit.
Therefore that figure is useful as an aiming point when recovering from a high altitude stall where you lower the nose to zero body angle to unstall the wings and maintain that body angle until reaching 230 knots IAS. It is then safe to level out. It means deliberately losing around 3000 ft of altitude because that is what it takes to accelerate to 230 IAS allowing for low thrust levels at high altitude.