Regulating the dose remains one of the biggest technical hurdles in FLASH. The ionization chambers used in standard radiotherapy can’t respond accurately when dose rates spike hundreds of times higher in a matter of microseconds. So researchers are developing new detector systems to precisely measure these bursts and keep pace with the extreme speed of FLASH delivery.
瑞幸走的是极致效率与性价比的路线，利润率本就微薄。在这样的前提下，平台补贴虽然带来了流量，但是，当平台补贴逐渐退潮，后遗症就出现了——外卖配送费直接挤压了原本微薄的利润。
。新收录的资料是该领域的重要参考
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