4.阅读并依据中文提示内容完成句子填空：The patient was first seen at the(1)______clinic(门诊部). After a CT scan revealed a(2)______(肿瘤) in the brain, he was rushed to the emergency room due to a sudden(3)______(大出血). The (4)______(神经外科医生) had to make a quick decision to save his life.

1. 第一空：outpatient

   • 语境为“患者首次就诊于门诊部”，医学中“门诊部”标准表达为 outpatient clinic，与 inpatient clinic（住院部）区分。

2. 第二空：tumor

   • CT扫描发现脑内病变，中文提示“肿瘤”，对应英文为 tumor（美式拼写），也可用 tumour（英式），此处采用通用形式。

3. 第三空：hemorrhage

   • “突然大出血”在急诊语境下，最准确的医学术语是 hemorrhage，作名词使用，符合“a sudden ___”结构。

4. 第四空：neurosurgeon

   • “神经外科医生”由词根 neuro-（神经）+ surgeon（外科医生）构成，完整术语为 neurosurgeon，符合专业语境。

最终完整句子：
The patient was first seen at the outpatient clinic. After a CT scan revealed a tumor in the brain, he was rushed to the emergency room due to a sudden hemorrhage. The neurosurgeon had to make a quick decision to save his life.