Which of the following is wrong about the clinical manifestations of gastrointestinal hemorrhage? ()
选项：

A:The clinical manifestation depends on the speed and amount of hemorrhage
B:Patients with upper gastrointestinal hemorrhage may present with melena
C:All patients with upper gastrointestinal hemorrhge have
hematemesis
D:Acute massive hemorrhage can usually cause hemorrhagic anemia
E:Patients with upper gastrointestinal hemorrhage may have low-grade
fever