稽留流产(missed abortion) 输卵管妊娠(tubal pregnancy) 男，36岁，髋关节疼痛、肿胀，活动受限1月，结合图像，最可能的诊断是() ["A．骨肉瘤","B．软骨瘤","C．股骨结核","D．软骨肉瘤","E．转移瘤"] 女，71岁，左肩痛，系统性红斑狼疮服用高剂量的类固醇半年，结合图像，最可能的诊断是() ["A．化脓性关节炎","B．类风湿关节炎","C．骨纤维肉瘤","D．肱骨头缺血坏死","E．肩关节结核"] 解释图中类型的胎盘早剥 阴道后穹隆穿刺(culdocentesis)