科学的假设与猜想是科学探究的先导和价值所在．在下列假设（猜想）引导下的探究肯定没有意义的选项是（　　）

    It was a cold night in Washington, D. C., and I was heading back to the hotel when a man approached me. He asked if l would give him some money so he could get something to eat. I'd read the signs "Don't give money to beggars." So I shook my head and kept walking.

    I wasn't prepared for a reply, but he said, "I really am homeless and I really am hungry! You can come with me and watch me eat!" But I kept on walking.

    The incident bothered me for the rest of the week. I had money in my pocket and it wouldn't have killed me to hand over a buck or two even if he had been lying. Flying back to Anchorage, I couldn't help thinking of him. I tried to rationalize (找借口)my failure to help by thinking government agencies, churches and charities were there to feed him. Besides, you're not supposed to give money to beggars.

    Somewhere over Seattle, I started to write my weekly garden column for The Anchorage Daily News. Out of the blue, I came up with an idea. Bean's Cafe, the soup kitchen in Anchorage, feeds hundreds of hungry Alaskans every day. Why not try to get all my readers to plant one row in their gardens dedicated to Bean's? Dedicate a row and take it down to Bean's. Clean and simple.

    The idea began to take off. Readers would fax or call me when they got something in their garden. Those who only grew flowers donated them. Food for the spirit.

    In 1995, the Garden Writers Association of America held their annual convention in Anchorage and after learning of Anchorage's program, Plant a Row for Bean's became Plant a Row for the Hungry. The original idea was to have every member of the Garden Writers Association of America write or talk about planting a row for the hungry sometime during the month of April.

    As more and more people started working with the Plant a Row idea, new changes appeared unexpectedly. Many companies gave free seed to customers and displayed the logo, which also appeared in national gardening publications. Row markers with the Plant a Row logo were delivered to gardeners to set apart their "Row for the Hungry."

    Garden editor Joan Jackson, supported by The San Jose Mercury News and California's nearly year-round growing season, raised more than 30,000 pounds of fruits and vegetables her first year, and showed GWAA how the program could really work. Texas fruit farms donated food to their local food bank after being inspired by Plant a Row. Today the program continues to thrive and grow.

    I am surprised that millions of Americans are threatened by hunger. If every gardener in America--and we're seventy million strong--plants one row for the hungry, we can make quite a decrease in the number of neighbors who don't have enough to eat. Maybe then I will stop feeling guilty about abandoning a hungry man I could have helped.

阅读下面的文言文，完成后面题。

    郝处俊，安州安陆人。甫十岁而孤，故吏归千缣赗①之，已能让不受。及长，好学，嗜《汉书》，崖略②暗诵。贞观中，第进士，解褐著作佐郎，袭父爵。兄弟友睦，事诸舅谨甚。召拜太子司议郎，累迁吏部侍郎。高丽叛，诏李勣为浿江道大总管，处俊副之．师入虏境，未阵，贼遽至，举军危骇。处俊方据胡床，体胖，安餐不顾，密畀料精锐击之，虏却，众壮其谋。入拜东台侍郎。

    时浮屠卢伽逸多治丹，曰“可以续年”。高宗欲遂饵之，处俊谏曰：“修短固有命，异方之剂，安得轻服哉? 昔先帝诏浮屠那罗迩娑寐案其方书为秘剂，取灵花怪石，历岁乃能就。先帝饵之，俄而大渐，上医不知所为，群臣请显戮其人，议者以为取笑夷狄，故法不得行。前鉴不远，惟陛下深察。”帝纳其言。

    上元初，帝观酺（yǒu）翔鸾阁，时赤县与太常音技分东西朋，帝诏雍王贤主东，周王显主西，因以角胜，处俊曰：“礼所以示童子无诳者，恐其欺诈之心生也。二王春秋少，意操未定，乃公朋造党使相夸，非所以导仁义，示雍和也。”帝遽止，叹曰：“处俊远识，非众臣所逮。”帝多疾，欲逊位武后，处俊谏曰：“昔魏文帝著令帝崩不许皇后临朝今陛下奈何欲身传位天后乎天下者非陛下之天下正应谨守宗庙传之子孙不宜持国与人以丧厥家。”事遂沮。

    开耀元年卒，年七十五。帝哀叹其忠，举哀光顺门，祭以少牢，赙③绢布八百段、米粟八百石，诏百官赴哭，官庀④葬事。子北叟固辞，未听。裴炎为白帝曰：“处俊阽死，诿臣曰：‘生无益于国，死无烦费，凡诏赐，愿一罢之。’”帝闻恻然，答其意，止赙物而已。处俊资约素，土木形骸，然临事敢言，自秉政，在帝前议论谆谆，必傅经义，凡所规献，得大体。

（节  选自《新唐书·郝处俊传》）

【注】①赗（fèng），送财物助人办丧事。 ②助人办丧事的财物。 ②崖略，简略叙述。③赙（fù），拿钱财帮助别人办理丧事。 ④庀（pǐ），治理。 ⑤阽（yán ）死，临近死亡。