High­tech glasses developed at Washington University School of Medicine in St. Louis may help surgeons visualize cancer cells, which glow blue when viewed through the eyewear. Cancer cells are notoriously difficult to see, even under high­powered magnification. The glasses are designed to make it easier for surgeons to distinguish cancer cells from healthy cells, helping to ensure that no tumor cells are left behind during surgery.
“We’re in the early stages of this technology, and more development and testing will be done, but we’re certainly encouraged by the potential benefits to patients，” said breast surgeon Julie Margenthaler, MD, an associate professor of surgery at Washington University. “Imagine what it would mean if these glasses got rid of the need for follow­up surgery and the associated pain, inconvenience and anxiety.”
Current standard of care requires surgeons to remove the tumor and some neighboring tissue that may or may not include cancer cells. The samples are sent to a pathology(病理) lab and viewed under a microscope. If cancer cells are found in neighboring tissue, a second surgery is often recommended to remove additional tissue that is also checked for the presence of cancer.
The glasses could reduce the need for additional surgical procedures and following stress on patients, as well as time and expense.
Margenthaler said about 20 to 25 percent of breast cancer patients who have lumps removed require a second surgery because current technology doesn’t adequately show the extent of the disease during the first operation.“Our hope is that this new technology will reduce or ideally eliminate the need for a second surgery，” she said.
In a study published in the Journal of Biomedical Optics, researchers noted that tumors as small as 1 mm in diameter (the thickness of about 10 sheets of paper) could be detected.
Ryan Fields, MD, a Washington University assistant professor of surgery and surgeon of Alvin J. Siteman Cancer Center, plans to wear the glasses later this month when he operates to remove a melanoma from a patient. He said he welcomes the new technology, which theoretically could be used to visualize any type or cancer.
“A limitation of surgery is that it’s not always clear to the naked eye the distinction between normal tissue and cancerous tissue，” Fields said.“With the glasses developed by Samuel Achilefu, PhD, professor of Washington University, we can better identify the tissue that must be removed.”
【改编】what is the ultimate goal of developing the new technology ?________.

A．to distinguish cancer cells from healthy ones

B．to encourage hope for life in cancer patients

C．to make sure no cancer cell is left behind

D．to cut down the risk of cancer surgery

The underlined word “eliminate” in Paragraph 5 is closest in meaning to ________.

A．meet	B．remove
C．feel	D．resist

【改编】From the whole passage,what can be inferred ?_____

A．The glasses are invented by Ryan Fields and Samuel Achilefu.

B．The glasses glow blue when finding tissues including cancer cells.

C．Tumors as small as 1 cm in diameter could be detected by the glasses.

D．Much remains to be done before the technology can be widely employed.

Which of the following would be the best title for the passage?

A．Special glasses help surgeons“see” cancer

B．A new technology has been used in surgery

C．Patients will benefit from a new technology

D．Cancer is no longer a threat to people