In babies the leading edge is most often caused by lymphoid hyperplasia, or the enlargement of lymphoid tissue.
在婴儿中,套叠前缘最常由淋巴样引起,即淋巴组织大。
Whatever the irritants are, their effect is to stimulate hypertrophy and hyperplasia of the mucinous glands in the main bronchi, as well as the goblet cells in the smaller airways - the bronchioles, which increases mucus production in both locations.
无论哪种刺激,都会激发主支气管黏液腺以及小气道杯状细胞的肥大,使得肺各个部位黏液产。