<image>As shown in the figure is a 72-hour temperature record chart of a patient. Look at the chart and answer the following:


(1) The nurse takes the patient's temperature every ____ hours.
(2) The patient's highest temperature is ____ degrees Celsius, and the lowest is ____ degrees Celsius.
(3) His temperature drops the fastest from ____ to ____ hours. From the temperature trend, the patient's condition is finally ____ (fill in "improving" or "worsening").