After John wrote the abstract "纵隔肿瘤是心胸外科较常见的疾病,病变侵犯至胸骨旁或胸骨上窝后超声能够显影.本文收集我院呼吸科及胸外科经影像学检查发现的48例纵隔占位患者,均在超声引导下经皮纵隔穿刺并进行组织学及细胞学检查,分析该穿刺技术的要点、安全性、阳性率及应用价值.", he wrote these keywords "活组织检查,针吸, 纵隔肿瘤, 细胞学技术". Do you think his choice of keywords was correct? Answer yes or no.
yes