Primary outcome measure
Time of temperature recovery.
Definition: time when axillary temperature drops below 37.3℃ without repetition after the first use of the drug.Regulation of axillary temperature recording (Mercury thermometer and body temperature measuring instrument): after the first usage in 24 h, the temperature will be measured in the first 2 h, 4 h, 6 and 8 h; and after 24 h, the temperature will be measured at least 2 times a day. When axillary temperature drops below 37.3℃ without repetition in 24 h, it is the treatment end point.