Sum up the researching fact about the task of "research on positioning system of GPS clear field vehicle", and give prominence to the pertinence and practicability on the system design.

Since there is little bleeding, the surgeon maintains a clear field of vision during the procedure, enabling complete removal of the abnormal tissue while avoiding critical nerves and blood vessels.

In the medical field, to take an obvious example, the pandemic meant that there were still clear shortages of doctors, nurses and other medical personnel.