ObjectiveTo aralyze The prevalence of premature children, mortality and complications to related factors, discussed measures to reduce the premature children mortality. MethodsFrom January 2003 to December 2006 and January 2007 January 2010 12 after 8 years in our hospital obstetric preterm children born in 1110 into the first 4 years of group and group 4 years after the two groups. Each group of children on the incidence of premature causes of death, complications were retrospectively analyzed. Results Preterm birth rate of first 4 years 2.85％ to 3.67％ after 4 years,the difference was statistically significant( P ＜0.05 ). Between the two groups the proportion of different age groups and the main types of diseases,no significant difference(P＞ 0.05). By comparison,the mortality of premature children dropped from the 12.06％ to 2.36％, a significant difference before and after ( P ＜ 0.01 ).ConclusionThe prevention and treatment of premature children was still very trduous task, particularly in preventing complications of preterm children was very important to prevent the occurrence of lung disease.

The safety of traditional Chinese medicine is affected by many factors, and the influence of exogenous harmful substances has been concerned and become a hot spot in recent years, especially heavy metals, pesticide residues and some other harmful substances. In order to explore the effects of non-soil and non-pesticide treatment on residues of these two harmful substances, the heavy metals and agricultural residues of Lilii Bulbus were detected, and the correlation of the data was analyzed. In this experiment, heavy metals and pesticide residues of Scrophulariae Radix were detected, and correlation analysis was conducted for their data. The mechanism of transport phase was interpreted with statistical moment similarity tool of total fingerprint by supramolecular chemistry theory. A large number of experimental data in this paper showed that heavy metals and pesticide contents in Lilii Bulbus basaltifolia had a positive correlation, which was closely related to supramolecular phenomena. Moreover, the similarity of fingerprints between Lilii Bulbus and Scrophulariae Radix suggested that Lilii Bulbus and Scrophulariae Radixa had a high selectivity in absorption of agricultural residues, which proved that the absorption of pesticides in Lilii Bulbus and Scrophulariae Radix from different habitats had the function of supramolecular imprinting template. It was considered that medicinal plant was a giant complex supramolecule with various levels of " imprinted template" . Heavy metals and agricultural residues were also involved in plant growth, forming an " imprinted template" for the formation of supramolecules between agricultural residues and heavy metals. After heavy metals and agricultural residues formed supramolecules, their liposolubility and permeability changed in varying degrees, and their transport in medicinal plants was promoted. Finally, the heavy metal supramolecules of pesticides were absorbed, distributed, aggregated and accumulated in plants. The purpose of the study was to reveal the mechanism of heavy metal and pesticide supramolecule transport, provide a new direction for the treatment of heavy metals and pesticide residues, and ensure the safety of traditional Chinese medicine.