The higher the air pressure is, the lower the air pressure is. How can passengers avoid discomfort due to the decrease of air pressure when the aircraft is flying at high altitude?

Modern trunk airliners all have pressurized cabins. They start to pressurize at an altitude above 3000 to stabilize the air pressure in the cabins at the pressure equivalent to 3000, because 3000 is a relatively safe pressure that the human body can bear. Generally, when an airplane has a problem, it is required to maintain at least 4000 air pressure. This is the highest air pressure altitude that the human body can survive

According to the meteorological statistics of a certain place, the air temperature will decrease by about 6 degrees for every 1000 meters increase in altitude. Now the ground temperature is 20 degrees, so the air temperature at 10000 meters will decrease
About how much

20-6 * 10000 / 1000 = 20-60 = - 40 degrees
40 degrees below zero

The larger raindrops fall from a height of about 1000m in a straight line with the same mass and reach the ground at a speed of about 4m / s
free falling movement
Or does it move in a straight line?

It starts with variable speed motion (it's not very clear whether to accelerate or decelerate, it seems to accelerate at first and decelerate later)
When the air resistance and gravity of the raindrop are equal, the acceleration is zero and the velocity is maximum
After that, the raindrops move at a constant speed
Because raindrops are subject to air resistance when they fall
The resistance is proportional to the speed
When the velocity is the maximum, the air resistance is the maximum, equal to the gravity. At this time, the acceleration is zero
After that, the raindrops are balanced, so they move at a constant speed

The higher the air pressure is, the lower the air pressure is. How can passengers avoid discomfort due to the decrease of air pressure when the aircraft is flying at high altitude?