Method: a before-after study in the same patient was applied.
方法：用自身前-后对照研究设计方案。
Ideal study times are after dinner or right after school before dinner.
理想的学习时间是晚饭后或者是放学后吃晚饭前的那段时间。
All had a biopsy of the esophagus before and after the study.
在研究前后进行食道的组织活检。
After coming home I made up my mind to study harder than before.
回家后我决心比以前更加努力学习。
DESIGN: a randomized self controlled study before and after treatment.
设计：随机、治疗前后自身对照研究。
Objective To study the value of ultrasound in incisional hernia before and after its operation.
目的探讨超声对切口疝修补手术前后检查的应用价值。
After this way of study, My English now gets much better than before.
这样学习之后，我现在的英语成绩比以前好多了！
Objective: to study the effect of nursing before and after operation of ectopic pregnancy.
目的：研究精心的围手术期护理对宫外孕患者的预后影响。
Objective: to study the effect of nursing before and after operation of ectopic pregnancy.
目的：研究精心的围手术期护理对宫外孕患者的预后影响。
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