While caring for several premature infants in the incubator(温箱),which of the following actions would be most important for pring nosocomial infections in these newborns?
A.
Using sterile supplies for all treatments.
B.
Performing thorough hand-washing before giving infant care.
C.
Donning cover gowns for nurses and visitors to the unit.
D.
Wearing a mask, and changing it frequently when giving care.