A Study of the Differences Between China and UK Classroom Teaching in Middle Schools Based on a BBC Documentary

This paper aims to analyze the differences between China and UK classroom teaching in middle school based on a case study ofa BBC documentary, Are Our Kids Tough Enough-Chinese School. The author found that there were many significant differences between the two countries in terms of the relationship between teacher and student, classroom teaching style and teaching methods.

土鳖虫对兔耳逆行皮瓣存活的影响及机制研究

目的 探讨土鳖虫对兔耳逆行皮瓣存活的影响及机制。方法 将32只健康大耳兔随机分为空白对照组、模型组、肝素钠组、土鳖虫组,每组8只兔。于兔右耳背部设计以兔耳中央动脉远端为蒂的逆行岛状皮瓣,设计皮瓣长7cm,宽3cm,蒂部宽1cm。土鳖虫组于皮瓣深层敷撒土鳖虫颗粒0.35g后将皮瓣原位缝合,肝素钠组在皮瓣深层敷撒肝素钠粉末0.29g后将皮瓣原位缝合,模型组直接将皮瓣原位缝合。空白对照组建立以兔耳中央动脉近端为蒂的顺行岛状皮瓣后将皮瓣原位缝合。术后1周大体观察各组皮瓣肿胀程度;术后第1、3、5天观察皮瓣血氧饱和度(SpO_(2));术后第2天检测血乳酸(Lac)、氧分压(PO_(2))含量水平;术后第3、5、12天各组随机取1只实验兔,病理染色后观察毛细血管内红细胞聚集程度、血栓形成情况;术后12d计算各组皮瓣存活面积。结果 (1)土鳖虫组术后皮瓣肿胀程度与模型组、肝素钠组、空白对照组比较普遍较轻。(2)术后土鳖虫组的SpO_(2)明显高于模型组、肝素钠组(P<0.01)。(3)土鳖虫组Lac含量水平低于模型组、肝素钠组(P<0.01),土鳖虫组的PO_(2)含量水平高于模型组、肝素钠组(P<0.01)。(4)土鳖虫组红细胞聚集情况及微血栓形成较模型组轻。(5)空白对照组、土鳖虫组、肝素钠组皮瓣存活明显高于模型组(P<0.01),土鳖虫组与肝素钠组比较差异无显著性意义(P>0.05)。结论 土鳖虫药物局部应用有利于促进兔耳逆行皮瓣的动脉供养及静脉回流,加快淤血肿胀的消退,改善皮瓣组织的缺氧状态,促进皮瓣血液循环的重建,有利于皮瓣的存活。