A.是診斷出血病因的首選檢查方法B.多在出血后24-48小時(shí)內(nèi)進(jìn)行C.多在出血后48-72小時(shí)進(jìn)行D.可判斷是否繼續(xù)出血或估計(jì)再出血的危險(xiǎn)性E.可同時(shí)進(jìn)行內(nèi)鏡止血治療
A.血紅蛋白濃度測(cè)定B.血細(xì)胞比容測(cè)定C.嘔血與黑糞的頻度與量D.網(wǎng)織紅細(xì)胞測(cè)定E.血容量減少所導(dǎo)致的周?chē)h(huán)衰竭的臨床表現(xiàn)
A.When it occurs ina patient with alcoholic liver disease,it is always due to oesophageal varices. B.A visible vessel seen at gastroscopy is not a risk factor for further bleeding. C.When it occurs in patientsover 70 years of age who may have arthritis,ususlly indicates malignancy. D.When it occurs afrer repeated retching,it is suggestive of an oesophageal tear. E.When it is caused by duodenal ulcer,a partial gastrectomy is usually necessary.