When his wife died, he lived ______; his lovely pet dog made him feel less ______.

A．alone, alone

B．lonely; alone

C．lonely; lonely

D．alone; lonely

一年轻患者在行右上颌第三磨牙麻醉后，颊部区域迅速膨大，患者自觉局部轻微胀感不适，触诊软，无压痛，边界不清。术后予以抗炎、冷敷，数日后肿胀逐渐消退，皮肤呈现黄绿色瘀斑。出现上述症状的可能原因是（）

A.注射区水肿

B.注射区血肿

C.注射区组织的应激反应

D.刺破眶下神经血管束所致

E.刺破下牙槽神经血管束所致