Objective:The head-up tilt test(HUTT)is widely used but is time-consuming and not cost-effective to evaluate patients wi......

中国古代文论"尚简"的特点是一个值得令人承扬的优良传统.从理论的抽象性和概括性、理论的接受需要积极主动的思考以提高接受的功......