C494 Explain

He instinctively glanced at the colonoscope's monitor to gauge the progress of the surgery, but the more he watched, the more bewildered and alarmed he became.

"You didn't use the colonoscope?" Zeng Lianjiang blurted out, quickly regaining his composure and clamping his mouth shut.

"Yes, I'm familiar with the internal situation. To lessen the patient's discomfort