金属铝质轻且有良好的防腐蚀性，在国防工业中有非常重要的作用，利用铝热反应完成钢轨的焊接非常方便迅速。完成下列填空：

（1）在特制漏斗中将铝热剂混合均匀后，引发铝热反应的操作是：                    ；

（2）硅与铝同周期。地壳里硅、铝的含量硅   铝（填＞,＜或=）。SiO₂是硅酸盐玻璃（Na₂CaSi₆O₁₄）主要成分，Na₂CaSi₆O₁₄也可写成Na₂O·CaO·6SiO₂。钠长石（NaAlSi₃O₈）的氧化物形式                          ，长石是铝硅酸盐，不同类长石其氧原子的物质的量分数相同。由此可推知钙长石的化学式为                      ；

（3）某铝合金由Al、Si、Cu、Mg组成。①称取100g该铝合金样品，分成等质量的A、B两份。向A份加入足量NaOH溶液，B份加入足量的稀盐酸。②待两份反应物都充分反应之后，称得滤渣质量相差1.60g，收集得到的两份气体的体积相差2240mL(标准状况下)。则样品中Si和Mg的物质的量分别是     和            。

During the admission interview, a client reports that she frequently has nightmares and memories of a rape that occurred 3 years ago. She feels depressed and asks the nurse, "Do you think I will ever get better I don’t know what is wrong with me. " The nurse’s most supportive response would be（）

A. "It sounds like you have some unresolved pain about the trauma. Take time here to talk and allow yourself to heal. "

B. "I’m not sure what is wrong, but the medication will help you soon enough. "

C. "It’s important to talk to your physician about an issue such as this. "

D. "Don’t feel bad; the treatment will help you. "