In the following items, what will not cause injury to the patient is :

A、Lowlevelofprofessionalskillsofmedicalstaff
B、Negligenceorcarelessnessofmedicalstaff
C、Appropriaterestrictionsorrestrictionsonpatients'freedombymedicalstaffforthetreatmentofdiseases
D、Medicalstaffforcepatientstocheckandtreat
E、Medicalstaffignoredthepatient'scallorinquiry