BACKGROUND The incidence of gastric cancer remains high,and it is the sixth most common cancer and the fourth leading cause of cancer deaths worldwide.Oral contrastenhanced ultrasonography is a simple,non-invasive,and...BACKGROUND The incidence of gastric cancer remains high,and it is the sixth most common cancer and the fourth leading cause of cancer deaths worldwide.Oral contrastenhanced ultrasonography is a simple,non-invasive,and painless method for the diagnosis of gastric tumors.AIM To explore the diagnostic value of oral contrast-enhanced ultrasonography for the detection of gastric tumors.METHODS The screening results based on oral contrast-enhanced ultrasonography and electronic gastroscopy were compared with those of the postoperative pathological examination.RESULTS Among 42 patients with gastric tumors enrolled in the study,the diagnostic accordance rate was 95.2%for oral contrast-enhanced ultrasonography(n=40)and 90.5%for electronic gastroscopy(n=38)compared with postoperative pathological examination.The Kappa value of consistency test with pathological findings was 0.812 for oral contrast-enhanced ultrasonography and 0.718 for electronic gastroscopy,and there was no significant difference between them(P=0.397).For the TNM staging of gastric tumors,the accuracy rate of oral contrast enhanced ultrasonography was 81.9%for the overall T staging and 50%,77.8%,100%,and 100%for T1,T2,T3,and T4 staging,respectively.The sensitivity and specificity were both 100%for stages T3 and T4.The diagnostic accuracy rate of oral contrast-enhanced ultrasonography was 93.8%,80%,100%,and 100%for stages N0,N1-N3,M0,and M1,respectively.CONCLUSION The accordance rate of qualitative diagnosis by oral contrast-enhanced ultrasonography is comparable to that of gastroscopy,and it could be used as the preferred method for the early screening of gastric tumors.展开更多
香港地区中学文凭考试(Hong Kong Diploma of Secondary Education Examination,HKDSE)英语口语公开考试中的小组互动部分受疫情等多种因素的影响而无法正常开展,需要探索其他口试形式。本研究探讨使用基于网络的协作视频会议工具Zoom...香港地区中学文凭考试(Hong Kong Diploma of Secondary Education Examination,HKDSE)英语口语公开考试中的小组互动部分受疫情等多种因素的影响而无法正常开展,需要探索其他口试形式。本研究探讨使用基于网络的协作视频会议工具Zoom进行网考口试(Internet-delivered Speaking Test)的可能性方案。选取40名中学生进行网考口试的试测,由经验丰富的口试考官对考生表现进行评分,并使用基于学习者语料库的方法研究口试考生在话轮转换和语法准确性方面的表现。通过对考生话语的语言分析,以及从考生处和考官处分别收集的反馈结果,证实网考口试是可靠且可行的。展开更多
The paper analyses the causes of the backwardness of oral English teaching in the universities from the aspects of CET4,oral classes,oral coursebook, teaching methodology and teaching evaluation.It also presents sever...The paper analyses the causes of the backwardness of oral English teaching in the universities from the aspects of CET4,oral classes,oral coursebook, teaching methodology and teaching evaluation.It also presents several strategies to change the unfavorable situation.展开更多
It is well over a decade since the English Self-taught Examinations (ESTE) were first administered across China. However, no report has been thus far published to show adequate attention has been paid to describing an...It is well over a decade since the English Self-taught Examinations (ESTE) were first administered across China. However, no report has been thus far published to show adequate attention has been paid to describing and validating the test in its own right. Therefore, the writer intends to take a close look at one of the course examinations required of the self-taught students in accomplishing a degree program — Oral Test (OT). This paper contains two major parts, with part one dealing with the limitations of the test examined in the light of current trends in testing theories and part two focusing on some suggestions with a view to enhancing the reliability and validity of the test.展开更多
文摘BACKGROUND The incidence of gastric cancer remains high,and it is the sixth most common cancer and the fourth leading cause of cancer deaths worldwide.Oral contrastenhanced ultrasonography is a simple,non-invasive,and painless method for the diagnosis of gastric tumors.AIM To explore the diagnostic value of oral contrast-enhanced ultrasonography for the detection of gastric tumors.METHODS The screening results based on oral contrast-enhanced ultrasonography and electronic gastroscopy were compared with those of the postoperative pathological examination.RESULTS Among 42 patients with gastric tumors enrolled in the study,the diagnostic accordance rate was 95.2%for oral contrast-enhanced ultrasonography(n=40)and 90.5%for electronic gastroscopy(n=38)compared with postoperative pathological examination.The Kappa value of consistency test with pathological findings was 0.812 for oral contrast-enhanced ultrasonography and 0.718 for electronic gastroscopy,and there was no significant difference between them(P=0.397).For the TNM staging of gastric tumors,the accuracy rate of oral contrast enhanced ultrasonography was 81.9%for the overall T staging and 50%,77.8%,100%,and 100%for T1,T2,T3,and T4 staging,respectively.The sensitivity and specificity were both 100%for stages T3 and T4.The diagnostic accuracy rate of oral contrast-enhanced ultrasonography was 93.8%,80%,100%,and 100%for stages N0,N1-N3,M0,and M1,respectively.CONCLUSION The accordance rate of qualitative diagnosis by oral contrast-enhanced ultrasonography is comparable to that of gastroscopy,and it could be used as the preferred method for the early screening of gastric tumors.
文摘香港地区中学文凭考试(Hong Kong Diploma of Secondary Education Examination,HKDSE)英语口语公开考试中的小组互动部分受疫情等多种因素的影响而无法正常开展,需要探索其他口试形式。本研究探讨使用基于网络的协作视频会议工具Zoom进行网考口试(Internet-delivered Speaking Test)的可能性方案。选取40名中学生进行网考口试的试测,由经验丰富的口试考官对考生表现进行评分,并使用基于学习者语料库的方法研究口试考生在话轮转换和语法准确性方面的表现。通过对考生话语的语言分析,以及从考生处和考官处分别收集的反馈结果,证实网考口试是可靠且可行的。
文摘The paper analyses the causes of the backwardness of oral English teaching in the universities from the aspects of CET4,oral classes,oral coursebook, teaching methodology and teaching evaluation.It also presents several strategies to change the unfavorable situation.
文摘It is well over a decade since the English Self-taught Examinations (ESTE) were first administered across China. However, no report has been thus far published to show adequate attention has been paid to describing and validating the test in its own right. Therefore, the writer intends to take a close look at one of the course examinations required of the self-taught students in accomplishing a degree program — Oral Test (OT). This paper contains two major parts, with part one dealing with the limitations of the test examined in the light of current trends in testing theories and part two focusing on some suggestions with a view to enhancing the reliability and validity of the test.
