What danger is presented if a waterspout passes over a ship?（）

A.Heavy rains could cause downflooding

B.Visibility could be restricted by low clouds

C.Large waves could cause structural damage

D.Personnel may be injured by loose deck gear blown by the wind

患者，男性，50岁，25年前曾患“血吸虫病”。3个月前曾因门静脉高压症呕血保守治疗痊愈。体检：巩膜无黄染，心肺(-)，脾肋下5cm，质地中等，无压痛。B超提示少量腹水。吞稀钡检查提示食管下段“蚯蚓”状改变。外周血RBC3.0×10¹²/L，WBC2.0×10⁹/L，PLT5.0×10⁹/L。适合该患者的治疗方案是

A．保守治疗，继续观察
B．单纯脾切除术
C．脾切除+贲周血管离断术
D．门腔静脉分流术