They feel free to do this after the treatment has been received, rather than before, so that there can be no suggestion that the gift is intended as a bribe or a request for preferential treatment.
وهم يشعرون ان بإمكانهم فعل ذلك بعد العلاج ،‏ لا قبله ،‏ لئلا يوحوا لأحد بأنهم يحاولون رشو الموظفين او يطلبون معاملة مميزة .‏