The beach is ______ walking distance of my house. That is to say, we can walk there easily.[ ]

A. for

B. on

C. beyond

D. within

入院后行上消化道造影示食管胃底静脉曲张，此时的治疗应为

A．继续保肝治疗

B．紧急三腔二囊管压迫

C．胃镜下注射硬化剂

D．预防性外科手术治疗

E．大量输全血，缓解贫血状态