慢性感染所致贫血。（）

A.血清铁降低，总铁结合力增加，铁饱和度下降

B.血清铁降低，总铁结合力降低，铁饱和度正常

C.血清铁正常，总铁结合力增加，铁饱和度下降

D.血清铁增加，总铁结合力正常，铁饱和度增加

E.血清铁增加，总铁结合力降低，铁饱和度增加

XP is (71) of interesting twists that encourage one to think--for example, how about "Test and then code" I’ve worked with software companies and a few IT organizations in (72) programmer performance was measured on lines of code delivered and testing was measured on defects found-- (73) side was motivated to reduce the number of defects prior to testing. XP uses two types of testing: unit and functional. (74) , the practice for unit testing involves developing the test for the feature prior to writing the code and further states that the tests should be automated. Once the code is written, it is immediately (75) to the test suite bringing instant feedback.

（71）处填（）。

A. filled

B. stuff

C. pack

D. full