Initially, the anemia is normocytic, which means that RBCs have a normal size, but eventually it can become microcytic, meaning RBCs get smaller.
起初，贫血患者体内的红细胞大小正常，但久而久之，红细胞会变小。
英语百科
Normocytic anemia
（重定向自Normocytic）
Normocytic anemia is a common issue that occurs for men and women typically over 85 years old. Its prevalence increases with age, reaching 44 percent in men older than 85 years.