In constructing cash flow forecasts for the medium term, an analyst should most appropriately:（）

A. base the forecast on recent cash flow (daily, weekly, monthly) only.

B. base the forecast on recent average cash flows with adjustment for trends and seasonality.

C. pay special attention to expected finaneings and capital expenditures.

下列哪种病不出现眼球钙化（）

A.视 * * 玻璃样小体

B.脉络膜肿瘤

C.视网膜母细胞瘤

D.甲状腺性突眼

E.海绵状血管瘤