Using an instrument which has a range from zero to 100, the nurse discovered that the patient has a reading higher than that of the average healthy person. After the medication was placed on the instrument, it showed that the patient's reading had returned close to normal, thus showing that the medicine was effective.
護士用一種有刻度的儀器以電針量他的手腳，測得的數值比正常健康人的高；把藥放進儀器後再測試，病人身體的數值回復到正常值左右，表示這些藥對病患有效。