2.方法(Methods):对研究的基本设计加以描述。包括诊断标准、分组情况及随访时间;研究对象的数量及特征,以及对在研究中因副作用或其它原因而撤消的研究对象数目;观察的主要变量及主要的研究方法;治疗手段包括使用方法及作用时间等。若为临床研究,需说明是前瞻性随机对比研究或回顾性分析。方法学研究要说明新的或改进的方法、设备、材料,以及被研究的对象(动物或人)。英文常需要用完整的被动或主动结构句子,动词用过去时态。常用英文表达方式:A randomized, double blind,placebo controlled trial was performed;A case control study;A prospective clinical study;We retrospectively analyzed...;W
e studied ...等。
4.结论(Conclusion):把研究的主要结论性观点,用一、二句话简明表达,不必另分段落或设小标题。结论应该有直接依据,避免推测和过于笼统。英文用完整句子表达,动词时态用一般现在时或现在完成时。最好直接写结论,也可用一些句型引出结论。常用英文表达方式:...is probably ...;...is ...;Our conclusion is that ...;This study shows that...;This study suggests that...;This study confirms that...;These observations support ...等。
2.英文所用时态需与事情发生时间相一致,叙述基本规律时可用现在时。叙述研究对象、方法和结果时,用过去时。
四、结构式论文摘要举例
Objective: To evaluate the perinatal and 2-year outcomes in pregnancies complicated by preterm premature rupture of membranes (PROM) during the second trimester. Methods: Fifty-three consecutive singleton pregnancies with PROM at 14 to 28 weeks of gestation were studied retrospectively. Management goals were to prolong the pregnancies to 32 weeks through expectant management and to avoid fetal compromise through closer monitoring and active intervention, when necessary, after 23 weeks. Outcome of the surviving infants was based on neurologic, audiometric, and ophthalmologic examinations at 2 years of corrected age. Results: Rupture of membranes occurred at 14~19 weeks (mean 17.4 weeks) in 10 wo
men, at 10~25 weeks (mean 24.0 weeks) in 24, and at 26~28 weeks (mean 27.6 weeks) in 19.The median latency periods to delivery were 72 days, 12 days, and 10 days when rupture of membranes occurred at 14~19 weeks, 20~25 weeks, and 26~28 weeks, respectively.The overall incidence of chorioamnionitis was 28%.There were no fetal deaths and nine neonatal
deaths. When rupture of membranes occurred at 14~19 weeks, 20~25 weeks,and 26~28 weeks, the perinatal survival rates were 40%,92% and,100%, respectively. Pulmonary hypoplasia accounted for seven deaths. Of the live-born infants, 81% were alive at 2 years of corrected age. Survival without major impairment was observed in 75%, 80%, and 100% of the survivors when rupture of membranes occurred at 14~19 weeks, 20~25 weeks, and 26~28 weeks, respectively. Conclusion: Expectant management of second-trimester PROM offers better perinatal and long-term survival than previously thought.