研究指出，PM2.5可能干扰蛋白质的消化吸收和芳香族氨基酸（如苯丙氨酸、酪氨酸和色氨酸）的代谢，这些干扰可能是PM2.5与早产之间联系的潜在中介。特别是皮质酮（cortexolone）和lysoPE ...

In 2018, China launched a national pilot program to promote labor pain relief, participated in by more than 900 hospitals. As a result, the average rate of pain relief use in these pilot facilities ...