Unfortunately, to check the accuracy of the software, the researchers still had to adopt the old-fashioned method of counting hairs, helped by volunteers from neighboring labs who put their skins on the line for science.

　　"We had 12 volunteers, mostly from neighboring labs, and we acquired images of hair before and after treatment," Dr Vallotton said.

　　To ensure an accurate count, the individual hairs had to be marked off as they were counted, but after such a laborious process, the researchers were pleased to discover the software results were comparable to the manual(手工的) count.

　　Dr Vallotton says the software could also be useful in testing the effectiveness of balding(秃头的) treatments and counting or tracing substances other than hairs, that are long and thin and otherwise difficult to image.

　　64. What do we know about the new software?

　　A. It has replaced human labor completely.

　　B. It is mainly used to detect hair problems.

　　C. It can be used for develop new medicine.

　　D. It can be used to test medical treatments.

　　65. What plays a key role in counting the number of hairs with the software?

　　A. A scanner.

　　B. A calculator.

　　C. A hair's unique feature.

　　D. A mathematical algorithm.

　　66. What did the 12 volunteers do in the experiment?

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