它仍然在他脑海中，正如他具有推理能力的左脑，使他在急救医学领域从事工作27年。
It remained in his mind even as his rational leftbrain kept him on the job in emergency medicine for 27 years.
我们知道指南上说左主干病变属于外科手术领域，但介入治疗左主干病变并不难。
We do know the guidelines still say this is a surgical domain but it is not more difficult to treat left main lesions.
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