单项选择题 Co-citation analysis has been proposed for the structural mapping of science by small and Marshakova in ( ).

单项选择题 某女，21岁，大学生，突然性胸闷，心悸，有濒死感，气不够用，出冷汗。上腹部不适，多次发作，每次持续数小时。此次发作难以忍受故来急诊就诊。广泛性焦虑一般不包括的症状是（）。

单项选择题 After __________ the angry mob shouting for his resignation, the President summoned his loyal aides to his office.