阅读下面这篇短文，短文后有2项测试任务：(1)第23～26题要求从所给的6个选项中为第2～5段每段选择1个正确的小标题；(2)第27～30题要求从所给的6个选项中选择4个正确选项，分别完成每个句子。
The Safeness of IUDs for
HIV-positive Women 1. Women infected with the most common
form of HIV may safely use the intrauterine device (IUD) for contraception,
provided they see a doctor regularly, new study findings suggest.
2. World Health Organization guidelines currently state that, in general,
HIV-infected women should avoid IUDs. "Those guidelines were essentially made on
theoretical concerns, and there are really very little data on what
contraceptive is appropriate for HIV-infected women," said the lead author Dr.
Charles S. Morrison in North Carolina. 3. Morrison and
colleagues gathered information on IUD-related complications at 1, 4 and 24
months after placement of the device in 636 women living in Nairobi, Kenya. Of
these women, 156 had HIV infection. Participating physicians did not know the
patients’ HIV status. There was "little difference in any side effects in
HIV-infected women compared with HIV-uninfected women, suggesting that the IUD
is likely an appropriate method for HIV-infected women," Morrison said. "This is
an important issue, because there are now 16 million women living with HIV and a
lot of them have a critical need for contraception," he added.
4. The researchers did find that women with infections such as gonorrhea
or chlamydia at the study’s outset were at increased risk of IUD complications,
confirming current guidelines suggesting that women with sexually transmitted
diseases not use IUDs. 5. In addition, there was no difference
in the amount of virus the HIV-positive women were releasing from their cervix,
or shedding8, at the beginning of the study compared with 4 months after the IUD
was inserted, the researchers reported in the August issue of the British
Journal of Obstetrics and Gynaecology. Conversely, some studies have shown a
relationship between increased cervical HIV shedding and the use of oral
contraceptives. 6. "What this study suggests is that you need to
avoid IUD use in women with a cervical infection but not women with HIV
infection," Morrison said. "Women with cervical infections are at increased risk
of complications; women with HIV infection are not." Paragraph 2 ______