A postgraduate student wants to answer the research question: “Does exclusive breastfeeding reduce the risk of eczema in infants?” She creates a strict search strategy with predefined inclusion and exclusion criteria, screens multiple databases, and critically appraises all included studies. What type of study is she conducting? 一名研究生想要回答研究问题：“纯母乳喂养是否能降低婴儿湿疹的风险？” 她制定严格的检索策略，预设纳入和排除标准，筛选多个数据库，并对所有纳入的研究进行批判性评估。她正在进行什么类型的研究？单项选择题

A

Systematic review 系统综述

B

Meta-analysis 荟萃分析

C

Cohort study 队列研究

D

Cross-sectional study 横断面研究

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A postgraduate student wants to answer the research question: “Does exclusive breastfeeding reduce the risk of eczema in infants?” She creates a strict search strategy with predefined inclusion and exclusion criteria, screens multiple databases, and critically appraises all included studies. What type of study is she conducting?

Which of the following trees corresponds to a potential parse of the ambiguous sentence below, with correct syntactic categories? Some diagnostics are provided.

Which of the following sentences contain two non-finite verbs? Select all that apply.

The syntactic head of a phrase is the most important element of a phrase and whose category defines the phrase's [ Select ] exponent movement distribution head . Single words or phrases that form part of a phrase but are not the head are called [ Select ] head complement dependent argument modifier . This classification can be further divided into: 1) [ Select ] arguments modifiers complements dependents heads , which have a closer relationship to the head, and are not easily reordered and 2) [ Select ] arguments complements dependents heads modifiers , which have a much looser connection to the head and can often be reordered with other [ Select ] heads modifiers complements dependents arguments . Consider the concrete example: "a strong cup of coffee" and the following diagnostics. In this example, "cup" is a [ Select ] dependent complement argument head modifier , "of coffee" is a [ Select ] argument dependent complement head modifier , "strong" is a [ Select ] argument modifier complement head dependent , and "a" is a [ Select ] modifier dependent head dependent complement .

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