脑干病变最具特征性的体征是（）. ["四肢瘫痪","交叉性瘫痪","饮水发呛","出现病理反射","声音嘶哑"]
下述脂蛋白中，不承担运载内源性甘油三酯的脂蛋白是（） ["A.HDL","B.乳糜微粒","C.IDL","D.LDL","E.VLDL"]
下列选项不属于介入治疗非血管管腔成形术范围（） ["胆道成形术","鼻泪管成形术","泌尿道成形术","消化道成形术","椎管成形术"]
糖尿病的基本病理生理改变是（） ["胰岛素绝对或相对不足","胰高血糖素分泌过多","糖皮质激素分泌过多","葡萄糖耐量减低","生长激素分泌过多"]
蛛网膜下腔出血后出现脑血管痉挛多发生在出血后（）. ["立即","3～14天","1天","14天以后","1个月以后"]
简述"临终"的概念和含义。
