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Background：Bronchialasthmaisanallergicpulmonarydis－ease．Theattackismostlyinducedbytheinhalationoforcontactwithallergens，suchaspollens，dusts，insects（suchasmite），germs，etc．Duringtheattack，patientshaveseveredyspneawhichisduetospasmofbronchialsmoothmuscles，sw