The nurse plans to administer an injection of heparin to a client. Which of the following techniques for heparin administration is appropriate

A. Selects a 1.5-inch, 21-gauge needle for the injection.
B. Makes the injection into the deltoid muscle.
C. Applies gentle pressure to the site for 5 to 10 seconds after the injection.
D. Aspirates with the plunger to check for entry into the blood vessel before injecting the heparin.

各取10%的无菌葡萄糖溶液100mL，加入少许酵母菌液，混匀、密封，按如图装置实验。如果测定甲、乙装置中CaCO₃沉淀均为10g，撤去装置，将两瓶溶液用滤菌膜过滤掉酵母菌，滤液分别倒入如下U形管中，开始时液面相平，下列对一段时间后A、B液面变化及其原因的叙述正确的是

A．A、B液面不变，因为生成CaCO₃相等，分解的葡萄糖也相等

B．A上升B下降，因为甲消耗的葡萄糖少，溶液浓度大

C．A下降B上升，因为甲进行有氧呼吸，分解的葡萄糖多，溶液浓度小

D．A下降B上升，因为乙进行无氧呼吸，分解的葡萄糖少，溶液浓度大