故范文甫开二十四克麻黄，让费父为子煎服。
So Fan prescribed twenty four grams of ephedra (Mahuang), and told his father to boil it.
范文甫因擅用峻剂而被人们所知，他用药大胆，并且收到良好的疗效。
Fan Wenfu was famous for using medicine with a high dosage. Though he medicate boldly, he often saved the patients from the edge of death, and it usually brought good curative effect.
范文甫知道费父略懂医术，当遇药量大时，费父常常考虑其子难以承受而减半药量。
So, if the child was given a large dose of herbs, his father, who thought the child was too weak to accept them, would always halve the dosage.
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