丈夫由外地回家，妻子应使用哪种避孕药() ["A．探亲避孕药","B．长效避孕药","C．长效避孕针","D．短效口服避孕药","E．阴道环"] 宫内节育器和甾体类避孕药相同的机理是() ["A．子宫内膜非细菌性异物反应","B．产生前列腺素","C．不利于孕卵着床","D．抑制卵泡的正常发育和排卵","E．吞噬细胞功能明显活跃"] 放置宫内节育器术后注意事项正确的是() ["A．休息2周","B．1月内忌性交及盆浴","C．3月内易脱落，故3月内每次经期或大便时注意有无脱落","D．3月后不需再随访","E．若放置后无不良反应可携带终生"] 下列哪项体征对诊断左心功能不全最有价值() ["A．心尖区舒张期奔马律","B．心率增快","C．心尖区收缩期杂音","D．双肺底湿性啰音","E．发绀"] 风心病心衰用洋地黄和利尿剂治疗，出现恶心，食欲不振，心电图为室性早搏二联律。首先考虑下列哪一种情况() ["A．心衰加重","B．低钾","C．洋地黄中毒","D．风湿活动","E．洋地黄剂量不足"] 下列哪项增加左心室前负荷可导致左心衰竭()