患者男，52岁，因“饱腹后突发腹痛4小时”来诊。患者初为上腹疼后转为全腹痛，伴有大汗、心悸、呼吸困难。患者曾有胃溃疡，近15天持续上腹不适、隐痛。既往有糖尿病病史10年。急诊检查？0.首先应给予的治疗是（提示为胃溃疡急性穿孔。查体：体温39℃，心率138次/分，血压89/55mmHg（1mmHg=0.133kPa）。动脉血气分析：pH7.38，氧分压（PO₂）78mmHg，二氧化碳分压（PCO₂）36mmHg，碱剩余（BE）-4mmol/L；血肌酐138μmol/L。）

补液时，不建议应用的液体是（）。

A.0.9%氯化钠溶液

B.乳酸复方氯化钠溶液

C.G.羟乙基淀粉（130/0.4）

D.新鲜血浆

E.5%葡萄糖溶液

F.羟乙基淀粉（200/0.5）

About fifty years ago, plant physiologists set out to grow roots by themselves in solutions in laboratory flasks. The scientists found that the nutrition of isolated roots was quite simple. They required sugar and the usual minerals and vitamins. However, they did not require organic nitrogen compounds. These roots got along free on mineral inorganic nitrogen. Roots are capable of making their own proteins and other organic compounds. These activities by roots require energy, of course. The process of respiration uses sugar to make the high energy compound ATP, which drives the biochemical reactions. Respiration also requires oxygen. Highly active roots require a good deal of oxygen.
The study of isolated roots has provided an understanding of the relationship between shoots and roots in intact plants. The leaves of the shoots provide the roots with sugar and vitamins, and the roots provide the shoots with water and minerals. In addition, roots can provide the shoots withorganic nitrogen compounds. This comes in handy for the growth of buds in the early spring when leaves are not yet functioning. Once leaves begin photosynthesizing, they produce protein, but only mature leaves can "export" protein to the rest of the plant in the form of amino acids.

Which of the following best describes the organization of the passage

A．The results of two experiments are compared.

B．A generalization is made, and several examples of it are given.

C．The findings of an experiment are explained.

D．A hypothesis is presented, and several means of proving it are suggeste