全文获取类型
收费全文 | 7724篇 |
免费 | 413篇 |
国内免费 | 4篇 |
专业分类
耳鼻咽喉 | 22篇 |
儿科学 | 175篇 |
妇产科学 | 243篇 |
基础医学 | 947篇 |
口腔科学 | 120篇 |
临床医学 | 1402篇 |
内科学 | 1147篇 |
皮肤病学 | 65篇 |
神经病学 | 753篇 |
特种医学 | 123篇 |
外科学 | 554篇 |
综合类 | 105篇 |
一般理论 | 9篇 |
预防医学 | 1245篇 |
眼科学 | 109篇 |
药学 | 578篇 |
中国医学 | 4篇 |
肿瘤学 | 540篇 |
出版年
2023年 | 35篇 |
2022年 | 56篇 |
2021年 | 110篇 |
2020年 | 91篇 |
2019年 | 116篇 |
2018年 | 162篇 |
2017年 | 113篇 |
2016年 | 121篇 |
2015年 | 148篇 |
2014年 | 185篇 |
2013年 | 379篇 |
2012年 | 472篇 |
2011年 | 508篇 |
2010年 | 307篇 |
2009年 | 281篇 |
2008年 | 496篇 |
2007年 | 559篇 |
2006年 | 544篇 |
2005年 | 567篇 |
2004年 | 545篇 |
2003年 | 484篇 |
2002年 | 471篇 |
2001年 | 71篇 |
2000年 | 73篇 |
1999年 | 90篇 |
1998年 | 90篇 |
1997年 | 97篇 |
1996年 | 73篇 |
1995年 | 63篇 |
1994年 | 66篇 |
1993年 | 60篇 |
1992年 | 60篇 |
1991年 | 42篇 |
1990年 | 55篇 |
1989年 | 53篇 |
1988年 | 49篇 |
1987年 | 47篇 |
1986年 | 37篇 |
1985年 | 35篇 |
1984年 | 46篇 |
1983年 | 43篇 |
1982年 | 38篇 |
1981年 | 27篇 |
1980年 | 33篇 |
1979年 | 21篇 |
1978年 | 22篇 |
1977年 | 13篇 |
1975年 | 11篇 |
1974年 | 14篇 |
1973年 | 12篇 |
排序方式: 共有8141条查询结果,搜索用时 0 毫秒
71.
72.
73.
A high percentage of patients who seek care from primary care physicians have a psychiatric disorder, either as the primary illness or secondary to a medical illness or drug use. Drs Thompson and Petersen discuss a number of approaches that physicians can take to better recognize psychiatric disorders, so that they may treat or consult on the less complicated conditions and refer complex or resistant conditions to a psychiatrist. 相似文献
74.
75.
Marjorie A. White Janice Grzankowski Eija Paavilainen Påivi Åstedt-Kurki Marita Paunonen-Ilmonen 《Issues in mental health nursing》2013,34(6-7):707-722
The purpose of this study was to describe family dynamics of Finnish families in which there is abuse or neglect of a child in that family. One adult from 41 families with recognized child abuse/neglect completed the Family Dynamics Measure II (FDM II) consisting of six dimensions of family life, and answered questions about problems, changes and illnesses. Nurses and social workers in community health care and social agencies identified potential subjects in their agencies and collected data. Four of the six dimensions of the FDM II reached statistical significance ( p =. 05) with child age and number of children, education, marital status, and age of respondent. They are: Flexibility vs. rigidity, Stability vs. disorganization, Clear vs. distorted communication, and Role reciprocity vs. role conflict. FDM II is useful in identifying several of the less positive family dynamics dimensions in abuse:neglect families. Conclusions for clinical management cannot be drawn at this time. 相似文献
76.
77.
The Cognitive Skills Program at the Albert Einstein College of Medicine has identified 1% to 2% of students from several classes whose learning disabilities were previously undiagnosed. In three case studies, the importance of early identification and support during the preclinical years—and the impact of diagnosis, evaluation, and intervention—are illustrated. In each case, there was a dramatic improvement in performance when the student was made aware of his or her learning disability and when appropriate intervention was provided. 相似文献
78.
79.
Annette Elizabeth McIntosh Janice Gidman Andrea McLaughlin 《Nurse education in practice》2013,13(6):578-583
This paper reports on a study that explored the perceptions of students and lecturers regarding support within a pre-registration midwifery programme in one Higher Education Institution in England. A mixed method design was used: questionnaires were completed by first year and third year students and lecturers, complemented by focus groups with each of the three sets of participants. The findings showed that there are multi-focal challenges for student midwives in undertaking their programme of study. The main theme that emerged was of the difficulties involved in maintaining an appropriate work–life balance, especially within what was seen as a relatively inflexible programme structure. The value of peer support was also highlighted as a key factor in helping the students succeed in their studies. There were a number of implications for midwifery educators to consider in optimising support for students. These include ensuring that students have realistic expectations at the outset of their studies, formalising peer support mechanisms and reviewing programmes to provide more flexibility to better underpin the maintenance of an appropriate work–life balance. Further study is warranted to explore perceptions of support in practice and to identify the factors that help students to persevere in their studies. 相似文献
80.
How to detect hepatocellular carcinoma in cirrhosis 总被引:11,自引:4,他引:11
Cirrhosis predisposes to hepatocellular carcinoma (HCC) which develops by sequential steps of de-differentiation of hepatocytes from regenerative nodules via borderline (dysplastic) nodules to frankly malignant HCC. Effective treatment depends on early recognition of HCC, so the key tasks for imaging are firstly recognising the presence of a suspicious lesion, and secondly differentiating between benign, borderline and malignant nodules. Screening of high-risk cirrhotic patients with sonography and measurement of alpha fetoprotein (AFP) is helpful but will not reliably differentiate small HCC from benign or dysplastic nodules. Large HCCs can usually be recognised by their characteristic morphology on imaging, but the appearances of smaller benign and malignant nodules show considerable overlap on unenhanced sonography, CT and MRI. Increasing degrees of histological malignancy are associated with increasing arterialisation and loss of portal blood supply, so the recognition of HCC requires the use of dynamic imaging with contrast-enhanced CT or T1-weighted MRI with gadolinium enhancement. Sonography with microbubble contrast media now offers another method for detecting arterialised nodules; however, some non-malignant nodules show arterial hypervascularity and a minority of HCCs are hypovascular, so the assessment of perfusion does not conclusively distinguish benign from malignant lesions. Kupffer cell function is another attribute of liver tissue which can be explored using MRI with superparamagnetic iron oxide particles (SPIO). Experience thus far suggests that uptake of SPIO is an effective discriminator between benign and malignant nodules. The combination of SPIO with gadolinium-enhanced MRI offers the opportunity for imaging characterisation of cirrhotic nodules by cellular function as well as by blood supply, and this approach is now proposed as the examination of choice for detecting HCC in cirrhosis. 相似文献