The work of doctors is very hard. When they perform spinal stenosis operations on patients, they stand for more than 8 hours, and they must be very focused during the process.
The work of doctors is very hard. When they assist patients with spinal stenosis surgery, they need to stand for more than 8 hours and be very focused during the process.
Doctors' work is very hard. They stand for more than 8 hours when they help patients with spinal stenosis surgery, and the process should be very focused.