据研究分析，新生儿的死亡率随着体重的增加而减少。
According to research and analysis, neonatal mortality rate as the increase in weight reduction.
新生儿院内感染明显增加了围产期死亡率，导致住院费用增加和住院时间延长。
The nosocomial infection of neonates increases perinatal mortality markedly, raises the cost and prolongs the length of stay in hospital.
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