脾淋巴管瘤USG表现中，哪项应除外（） ["强回声区","无回声区","壁薄可有声隔","境界清楚","后壁回声增强"]
不会引起肾小球滤过率降低的是（）。 ["肾动脉硬化","妊娠","慢性肾衰","糖尿病肾病","甲状腺功能减退"]
垂体瘤不易（） ["沿脑脊液种植","出血","侵犯海绵窦","压迫视交叉","使垂体柄偏移"]
脾胃虚弱恶阻的首选方是（） ["参苓白术散","四君子汤","香砂六君子汤","小半夏加茯苓汤","苏叶黄连汤"]
采用不通过血脑屏障显像剂的脑静态显像中脑梗死阳性发现多见于起病后（） ["第一天内","第一周内","第2-4周","第五周后","第六周后"]
简述BLS的基本程序。
