目前用于治疗湿性年龄相关性黄斑变性的激光疗法有________、________和________。
参考答案：激光光凝 经瞳孔温热疗法 光动力学治疗
下列属瘀血所致病证之特征的是（）
A.胁肋胀痛
B.肿块时聚时散
C.疼痛如针刺
D.出血色淡清稀
E.舌淡苔滑
Gun control is a subject ______ Americans have argued for a long time.[ ]
A. of which
B. with which
C. about which
D. into which
