《旧唐书·列传·卷一百二十》
春季，通常说是难于养病的季节，需要尽力调养护理，尽快血气和顺。
春时俗说难于将摄，勉加调护，速就和平。
Spring is generally said to be a difficult time to recover from illness, so you should try your best to rest and recover, so that your energy and blood will be balanced as soon as possible.