男性，30岁。左下后牙自发性肿痛，吸吮时易出血。自诉5d前曾用牙签剔牙。口腔检查：牙间 * * 红肿有明显探触痛，易出血。牙体无龋坏和非龋性疾病。叩诊（+），无松动，未探及牙周袋。可能的诊断是（）

A．急性牙髓炎

B．急性牙周炎

C．急性根尖周炎

D．急性龈 * * 炎

E．急性坏死溃疡性龈炎

4.

(c) Describe TWO substantive procedures the external auditor of Bluesberry should adopt to verify EACH of the following assertions in relation to an entity’s property, plant and equipment;(i) Valuation;(ii) Completeness; and(iii) Rights and obligations.Note: Assume that the hospital adopts International Financial Reporting Standards. (6 marks)