简介:AbstractForecasting the COVID-19 confirmed cases, deaths, and recoveries demands time to know the severity of the novel coronavirus. This research aims to predict all types of COVID-19 cases (verified people, deaths, and recoveries) from the deadliest 3rd wave data of the COVID-19 pandemic in Bangladesh. We used the official website of the Directorate General of Health Services as our data source. To identify and predict the upcoming trends of the COVID-19 situation of Bangladesh, we fit the Auto-Regressive Integrated Moving Average (ARIMA) model on the data from Mar. 01, 2021 to Jul. 31, 2021. The finding of the ARIMA model (forecast model) reveals that infected, deaths, and recoveries number will have experienced exponential growth in Bangladesh to October 2021. Our model reports that confirmed cases and deaths will escalate by four times, and the recoveries will improve by five times at a later point in October 2021 if the trend of the three scenarios of COVID-19 from March to July lasts. The prediction of the COVID-19 scenario for the next three months is very frightening in Bangladesh, so the strategic planner and field-level personnel need to search for suitable policies and strategies and adopt these for controlling the mass transmission of the virus.
简介:目的总结19例输尿管肿瘤的诊治体会。方法术前19例均行B超、IVU和CT检查,选择性结合逆行性尿路造影或输尿管镜检查和活检。19例输尿管肿瘤中1例行输尿管节段切除加端端吻合术,行根治性肾、输尿管切除加膀胱袖状切除14例次,输尿管镜钬激光治疗输尿管癌2例,输尿管息肉3例。结果术前诊断准确率94.7%(18/19),术后随访5个月~7年,平均3.2年,1例输尿管节段切除术后1年复发,1例腔内手术半年发生输尿管狭窄,膀胱肿瘤发生3例,随访≥5年7例,存活3例。结论B超、IVU和逆行性尿路造影可作为输尿管肿瘤的初步诊断,CT可以帮助诊断和临床分期,输尿管镜检查可提高输尿管肿瘤诊断正确率和确定病理类型。输尿管肿瘤手术预后取决于病理分级和临床分期,腔内手术仅适合于早期低级别肿瘤。
简介:本题是一道经典的物质鉴别题。学生只要知道:不用其他试剂鉴别物质有两种情况,即①组内有特殊物质,利用特殊物质来鉴别其他物质;②组内没有特殊物质,通过组内各物质两两混合,现象各不相同加以鉴别,就不难看出C选项符合题意。
简介:日前,国家食品药品监督管理局发布了今年第一季度国家药品质量公告,其中公布了19种药物为劣质药,并根据其严重性作出处理。