题目内容：

    As pictures of the recent Northern California wildfires confirm, living on the edge of a forest comes with considerable dangers. But new research from Germany suggested closeness to a wooded area may not have all unfavorable effects.

In a study of older urban residents, it was found that living close to forest land is linked with strong, healthy functioning of a key part of the brain. This indicates that, compared with those who live in a mostly man-made environment, people who live on the boarder between city and forest may be better able to deal with stress.

“The findings suggest forests in and around cities are valuable resources that should be promoted,” writes a research team led by Simon Kuehn of the Max Plank Institute for Human Development in Berlin.

The researcher analyzed data on 341 participants in the Berlin Aging Study II, all of whom were between the ages of 61 and 82. They specifically looked at three different signals of brain structural function, each of which provided distinct information on several key brain regions. They also noted the amount of forest land within a one-kilometer distance of each participant’s home address.

“Our results reveal a significant positive association between the coverage of forest and amygdale (扁桃腺) function,” the researchers report. The amygdale is the set of neurons (神经元) that plays a key role in processing emotions, including fear and anxiety.

Perhaps surprisingly, Kuehn and her colleges found the amygdale function wasn’t germane to living close to urban green spaces such as parks, or bodies of water. Only closeness to forest land had this apparent positive effect.

More research will be needed to confirm that forest has a stronger, measurable impact on brain health than exposure to other forms of nature. But the evidence keeps mounting that, in stressful times, there is much to gain by surrounding yourself with plants and …

1.What’s the finding of the new research?

A.Brain activities relate to stress control.

B.Man-made environment may lead to stress.

C.Old urban citizens have healthier brain functions.

D.Living near a forest may help relieve pressure.

2.What is paragraph 4 mainly about?

A.The result of the new study.

B.The standard of choosing participants.

C.The preparations for the study.

D.The process of the new study.

3.What does the underlined part “germane to” in paragraph 6 mean?

A.beneficial to B.damaged by

C.relevant to D.limited to

4.What may be the author’s attitude towards living close to the forest?

A.Cautious. B.Favorable.

C.Ambiguous. D.Disapproving.