问题：
[单选题]患者，女，78岁。使用全口义齿有20余年历史，近半年更换一副全口义齿，下颌义齿易脱落，压痛，经多次修改均无效。查：下领义齿固位差，上颌义齿固位尚好，牙槽嵴呈刃状，黏膜上有散在性出血和压痕，全身状况较差。欲解决固位及疼痛问题，对该患者首先的治疗是（ ）。
A、继续修改
B、重新制作
C、自凝塑料重衬
D、自凝软衬材料重衬
E、建议做种植义齿
参考答案：
D
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